STEP-Aligned HAWK Signal Installed in Bergen County

Every Day Counts (EDC) is an initiative developed by the Federal Highway Administration’s (FHWA) Center for Accelerating Innovation to improve safety along our roadways. Every two years, EDC identifies a number of highway safety innovations that are then supported for rapid deployment. A set of innovations targeted at pedestrian safety was identified within the 2019–2020 EDC cycle. Safe Transportation for Every Pedestrian (STEP) provides a set of pedestrian improvements ranging from small scale signage installation to fully revamped roadway layout through road diets. STEP-aligned projects have been successfully deployed in locations across New Jersey, including a recent pedestrian improvement project along Washington Avenue in the Borough of Carlstadt in Bergen County, New Jersey.

Washington Avenue is a four-lane, bidirectional road with a speed limit of 40 miles per hour. The corridor hosts a number of industrial businesses and therefore witnesses a great deal of truck traffic. Many employees working at these sites arrive by bus and dash across the four lane roadway to avoid walking 700 feet to the nearest lighted intersection at Veterans Boulevard.

In early 2013, a pedestrian fatality occurred along the corridor. According to Christine Mittman, North Jersey Transportation Planning Authority, concerned county officials submitted an application to the North Jersey Transportation Planning Authority (NJTPA) through the Local Safety Program which utilizes Highway Safety Improvement Program funds. In order to develop comprehensive and effective solutions for the corridor, the New Jersey Department of Transportation and NJTPA recommended a road safety audit for a 1.6-mile section of Washington Avenue from Moonachie Avenue to Road A, just north of the Paterson Plank Road.

Figure 1. At this location along Washington Avenue, pedestrians were forced to walk in the travel lane (photo credit: Christine Mittman, NJTPA).

Figure 1. At this location along Washington Avenue, pedestrians were forced to walk in the travel lane (photo credit: Christine Mittman, NJTPA).

A road safety audit is a tool promoted by FHWA to identify safety issues for all users along a designated area of roadway. An independent multidisciplinary team walks the corridor observing and taking notes related to safety concerns, user conflicts, and roadway performance issues. Often the auditors use a standardized form to take notes about each section of the corridor being studied. Some issues that may arise include missing street lights, uneven sidewalks, areas where turning conflicts are common, and high volumes of pedestrians crossing the roadway outside of crosswalks. Additional guidance from FHWA can be found here.

During the Washington Avenue road safety audit, it became obvious that the pedestrian infrastructure along the corridor was insufficient. Paths were worn into the grass along either side of the roadway where sidewalks were missing. Workers crossed the road all along the corridor as trucks flew by. In some areas of the corridor, pedestrians were forced to walk within the vehicular travel lane as the pedestrian right of way was blocked and there was no shoulder along Washington Avenue (see Figure 1). The situation was clearly dangerous.

Once the recommendations were made through the road audit report, the project was advanced through the Local Safety program which included funding for both design and construction. A number of recommendations from the report made it into the final designs, including several pedestrian safety improvements at Barrell Avenue. These recommendations included completing the sidewalk network, relocating the bus stops for safer pedestrian crossings, and extending the Jersey barrier median with fencing along the top. The most innovative part of the design was the installation of a high-intensity activated crosswalk beacon (HAWK) signal, the first of its kind in Bergen County.

A HAWK signal, or Pedestrian Hybrid Beacon, is a traffic control signal that assists pedestrians in locations where a traffic intersection is not signalized.  When pedestrians are not present, the HAWK signal is unlit. But, as its name implies, when the HAWK is activated by the push of a button it proceeds through a light sequence that stops traffic while the pedestrian safely crosses the roadway with a countdown. A video of the HAWK signal control process can be found here.

A HAWK signal was installed just north of the intersection of Barrell Avenue and Washington Avenue for a number of reasons (see Figure 2). The first consideration was the high volume of pedestrian traffic coupled with a lack of traffic control at the T-intersection. Secondly, the area is situated about midway between the two nearest signal controlled intersections with pedestrian crosswalks.  Additionally, the overhead nature of the HAWK plays a much stronger role in capturing drivers’ attention as compared to placing rectangular rapid flashing beacons on either side of the roadway. Bus stops were relocated on either side of Washington Avenue near the HAWK signal to ensure the stops are safely accessible to patrons from both sides of the roadway.

Figure 2. HAWK signal located north of the intersection of Barrell Avenue and Washington Avenue.

Figure 2. HAWK signal located north of the intersection of Barrell Avenue and Washington Avenue.

According to Nancy Dargis from the Bergen County Division of Planning and Engineering, local officials were concerned that drivers would not understand how to respond to the new signal. However, since the project’s completion in late 2018, driver compliance rates have been high according to the Carlstadt Police Department. A post-implementation crash data analysis will be performed once three years of data is available, at which time more details will be available regarding the HAWK signal’s effectiveness on Washington Avenue.

Additional research related to the general effectiveness of HAWK signals is currently being undertaken by an NJDOT-funded study out of Rutgers University’s Alan M. Voorhees Transportation Center and Rowan University. The study seeks to measure both the public’s understanding of the HAWK signal and its effectiveness in increasing driver yielding at pedestrian crossings.  The study will be completed this year.

The Washington Avenue HAWK signal was part of a $4.2 million project improving the safety of a 1.6-mile corridor of Washington Avenue. The project costs included sidewalk installations, drainage, new and upgraded signals, ADA compliance improvements throughout the corridor, guardrail upgrades, and an extended Jersey barrier median with six feet of fencing along the top.

Officials learned during implementation that the fencing along the median barrier would create sight line issues for drivers approaching the crosswalk when pedestrians were in the crosswalk on the opposite side of the road. After some research, they determined the safest course of action would be to take down the fencing for the 100 feet approaching the crosswalk in both directions. Additionally, officials pointed out the importance of installing the HAWK signal at an appropriate location. Specifically, the HAWK signal should not be placed at an intersection in place of a full traffic signal. The Washington Avenue HAWK signal is installed near, but not at, the Barrell Avenue intersection which is a T-intersection with a minimally trafficked side street.

The Washington Avenue HAWK signal was the first HAWK signal installed in Bergen County, and so far it has been a success. The signal has been seamlessly incorporated into the traffic movements in the area and local officials are happy with the results.  Several more HAWK signals are in the works in locations throughout the NJTPA region as officials work to implement safety improvements aligned with the EDC STEP initiatives.

 

RESOURCES

Every Day Counts Initiative: https://www.fhwa.dot.gov/innovation/everydaycounts/about-edc.cfm

Safe Transportation for Every Pedestrian (STEP): https://www.fhwa.dot.gov/innovation/everydaycounts/edc_5/step2.cfm

FHWA Road Safety Audit information and resources: https://safety.fhwa.dot.gov/rsa/

NJDOT videos describing FHWA’s Pedestrian Safety Countermeasures: https://www.njdottechtransfer.net/2019/09/27/njdot-safety-countermeasures-videos/

FHWA HAWK information and statistics: https://safety.fhwa.dot.gov/provencountermeasures/ped_hybrid_beacon/


This article is cross-posted on the NJ Bike & Pedestrian Resource Center blog.

 

A UAS flown during the TRB visit to New Jersey DOT captured an aerial image of the Wittpenn Bridge.

Collaboration Demonstration: New Jersey Hosts State Partnership Visit

By Stefanie Potapa, Amanda Gendek, and Glenn Stott

Above: A UAS flown during the TRB visit to New Jersey DOT captured an aerial image of the Wittpenn Bridge.

Each year, representatives from the Transportation Research Board (TRB) visit with state departments of transportation (DOTs) to strengthen the partnership between TRB and state DOTs, identify current issues, collect and generate information, and disseminate that information throughout the transportation community.

In late February, Christine L. Gerencher and Andrew C. Lemer of TRB traveled through inclement weather from Washington, D.C., to New Jersey to visit with staff from various New Jersey DOT units. They were met by hosts Mike Russo, Assistant DOT Commissioner, and Amanda Gendek, Manager, Bureau of Research (BOR), as well as more than 40 staff members.

Knowledge-Sharing Opportunity
The annual TRB state visit allowed New Jersey DOT and TRB staff to share knowledge and information on initiatives, issues, and research directions.

The annual TRB state visit allowed New Jersey DOT and TRB staff to share knowledge and information on initiatives, issues, and research directions. Photo courtesy Stefanie Potapa

The annual TRB field visit is an important part of BOR’s program because it provides a forum for New Jersey DOT staff to share such information as research initiatives, new technologies, best practices, lessons learned, or specific problems they are currently facing. The TRB representatives then can transmit that information back to TRB so that other states, industry members, or educational institutions can benefit from it or use it to help solve the identified problem. The TRB visitors also highlight the Board’s range of services to the DOT and help identify potential candidates from New Jersey DOT staff for TRB committees.

Gerencher is a senior program officer at TRB, managing nine committees within the Aviation group and eight committees within the Environmental and Energy Section as well as chairing the editorial board of TR News. Lemer is a senior program officer in TRB’s National Cooperative Highway Research Program (NCHRP), managing a diverse portfolio of NCHRP-sponsored research projects with a focus on transportation asset management, system performance measurement and management, regional development, and agency information and knowledge management.

Kimbrali Davis and Stefanie Potapa of BOR worked diligently to produce the two-day event, collaborating with members of the following New Jersey DOT units and subject areas: Environmental Resources, Capital Investment and Development, Aeronautics, the Unmanned Aircraft System (UAS) Program, Local Aid and Economic Development, and Asset Management. The first day of the field visit allowed Gerencher and Lemer to hear presentations from each invited New Jersey DOT unit, followed by a roundtable discussion. These discussions covered challenges, accomplishments, research needs, and New Jersey DOT participation in various TRB committees and subcommittees.

Field Observations
When using a UAS for inspection, the resident engineer closely follows protocol to operate the camera controls. Photo courtesy Stefanie Potapa

When using a UAS for inspection, the resident engineer closely follows protocol to operate the camera controls. Photo courtesy Stefanie Potapa

The next day, Shukri Abuhuzeima, Executive Regional Manager, Capital Program Management, presented an overview of the Route 7 Wittpenn Bridge construction project, complete with project-related statistics and background. Glenn Stott, UAS Coordinator, then spoke about the agency’s UAS program and briefed the participants on what to expect when they would arrive at the construction site later that morning.

The group then traveled to the construction site, where all individuals were briefed on safety. Stott, UAS pilot Koree Dusenbury, and visual observer Ashley Davis began a UAS flight demonstration to highlight the capabilities of these vehicles in construction project management and bridge inspection applications. For example, using a drone to inspect projects like the Wittpenn Bridge allows inspection personnel to remain safely on the ground rather than being suspended high over a busy waterway. The drone also can move quickly from one area to another, allowing each inspector to view more structure in less time.

Flight Demonstration

The flight began with Davis and Dusenbury conducting a full systems check followed by a detailed briefing of the mission. In his briefing, Dusenbury—a new Federal Aviation Administration–certified UAS pilot in the Bureau of Aeronautics—included current weather conditions, potential hazards, obstructions such as overhead wires, the flight profile, and actions to be taken in the event of an emergency.

TRB senior program officer Christine Gerencher (left) and New Jersey DOT UAS pilot Koree Dusenbury (right) prepare for the flight demonstration.

TRB senior program officer Christine
Gerencher (left) and New Jersey DOT UAS pilot Koree Dusenbury (right) prepare for the flight demonstration. Photo courtesy Stefanie Potapa

The visual observer is the crew’s safety person, who keeps a close eye on potential hazards to the mission. The resident engineer is tasked with ensuring the quality of work; traditionally, this person uses tools such as a bucket truck to inspect the bridge. When using a UAS, however, the resident engineer operates the camera controls and can pan, tilt, zoom, and take photos. The strict and professional communication phrases and safety procedures among the remote pilot, visual observer, and resident engineer during the flight demonstrated impressive coordination and commitment to safety. The remote pilot first communicated each movement of the drone—which then was acknowledged by the crew—before making an input into the UAS controller.

Thanks to a large flat-screen television behind the rear seats of the New Jersey DOT Bureau of Aeronautics drone SUV, visitors and staff were able to observe everything on the control screens of the UAS operators and inspectors during the flight, in real time. This arrangement minimizes crew distractions and maximizes the level of detail available for resident engineers and other observers to evaluate. The large screen also displays flight telemetry, such as battery levels, altitude, speed, and camera settings. The inspection camera’s optical zoom is capable of 30x magnification, so the drone can safely fly 20 feet away from a bridge and can still zoom in to magnify critical areas needing closer inspection.

Gerencher commented that the format of the visit could be used as a model for other states on how to prepare for annual TRB state partnership visits.

Potapa is Research Project Manager, Bureau of Research; Gendek is Manager, Bureau of Research; and Stott is Unmanned Aircraft Systems Coordinator, Bureau of Aeronautics, New Jersey Department of Transportation, Trenton.

Click here for a PDF of this article.


This article originally appeared in TR News, January-February 2020 issue. TR News is copyright, National Academy of Sciences, Engineering, and Medicine; posted with permission of the Transportation Research Board.

TECH TALK! Webinar: EDC Safe Transportation for Every Pedestrian

UPDATE: This live webinar has been postponed and will be rescheduled for a later date.

Those who are registered will remain registered.

 

Please join the NJDOT Bureau of Research on April 2nd for an Innovation Exchange Webinar, “EDC Safe Transportation for Every Pedestrian (STEP)”, that we are convening in Training Room A in the E&O Building at NJDOT Headquarters.

Safe Transportation for Every Pedestrian (STEP), an Every Day Counts (EDC) innovation, is about a new type of “STEP” to keep pedestrians safe at uncontrolled road crossing locations. This webinar will outline five cost-effective countermeasures available to local agencies, and identify resources to guide in their selection and installation. Stories from local agencies will tell of county, city, and Tribal deployment leadership, with details on site and countermeasure selection, installation, monitoring, and improved safety measures of success.

AICP and NJ PE credits are available. This “live” webinar event is free to attend, but you must register ahead of time to guarantee a seat as there is limited space in the training room:

WEBINAR: EDC Safe Transportation for Every Pedestrian (STEP)

POSTPONE AND WILL BE RESCHEDULED.

Time: 1:00 PM – 2:30 PM; Sign-in: 12:50 pm
Location:  NJDOT E&O Building, Training Room A
1035 Parkway Avenue, Trenton, NJ 08625

This Innovation Exchange webinar is one in a series sponsored by the Center for Local Aid Support (CLAS) in the Federal Highway Administration’s Office of Innovative Program Delivery.  Through Innovative Exchange webinars, CLAS is bringing cutting-edge transportation leaders to the table to share ideas and out of the box innovative practices that have proven results.

 

2020 NJDOT TRB Annual Meeting Recap

The 2020 NJDOT TRB Annual Meeting Recap, held on February 13th 2020, provided an opportunity for NJDOT staff who attended the 99th Transportation Research Board (TRB) Annual Meeting to share their observations and notes from attendance at workshops, lecture and poster sessions, task force and committee meetings.

Below you can view the 2020 presentations and session notes by the participating NJDOT staff which are grouped by their bureau or unit. Click on the image in each section to view the slides. You can also download the entire set of presentations here: 2020 NJDOT TRB Annual Meeting Recap Slides (6 MB). The TRB AMOnline portal provides access to all available TRB papers, presentation slides, and visual aids.

The video (right), What Do Transportation Professionals Look Like?, was also shared as part of the event.

  • Introduction to TRB and the Annual Meeting
  • How to Attend /Get Involved with TRB
  • Recap (Transfer of Knowledge)
  • Questions & Open Discussion
  • Current Research in Marine Environmental Issues
  • Inland Water Transportation
  • Concrete pH Profiles in Marine & Freshwater Environments
  • Utilizing Agent-based Modelling to Evaluate Operational Impacts of an Incident & Possible Alternatives on U.S. Waterways
  • Future of North American Freight Rail Transportation
  • New Technology in Rail Freight
  • Using Drones for Railway Maintenance, Safety, Security

■  Site Selection Processes
■  Truck Parking
■  Last Mile Trends Around the World

  • Travel Behavior During Emergency Evacuations
  • Transportation Solutions in Parks and Public Lands
  • Planning at a Crossroads
  • Right Sizing
  • State DOT-CEO Roundtable: Towards Zero Deaths: State DOTs Renewing Focus on a Nation Public Health Crisis
  • Hyperloop: Commuter Dream or Regulatory Nightmare?
  • Recycled Plastics in Pavements
  • Low-Cost Ultra High Performance Concrete
  • Bridge Decks
  • Work Order Status
  • Public Acceptance Automated Vehicles
  • Railroad Trespassing Detection
  • Connected Autonomous Workzone
  • Optimizing Pavement Management Systems
  • Optimizing Facility Locations
  • New Jersey Executive Orders and Energy Master Plan
  • Decarbonization & Resilience
  • TRB Special Task Force on Climate Change → Transportation and Sustainability Section (AMS00)
  • Landscape and Environmental Design
  • Treatment of Highway Stormwater Runoff
  • Seasonal Climatic Effects on Transportation Infrastructure
  • New Directions in Hydraulic Scour Design
  • Current Practices in Highway Stormwater Management
  • Collecting & Managing Vegetation Assets on the Roadway
  • Connected & Automated Vehicles & Roadways
  • Managed Lane Strategies
  • Designing Safer Streets
  • Barrier Design
  • LiDAR and Photogrammetry
  • Weigh-in-Motion Data to Design, Rate, Manage, and Preserve the Nation’s Bridge Structures
  • Resilience, Safety, and Security of Bridges and Tunnels
  • FHWA Long-Term Bridge Performance Program
  • Autonomous Vehicles DOT-WH Initiative
  • CBS/FHWA Structures Collaboration
  • Data Governance
  • Public Transit Innovation: Past, Present, and Future
  • Evaluation of Signs and Markings Based on User Needs
  • Traffic Control Devices Challenge: Connected and Autonomous Innovations for Improving Work Zone Safety-Hybrid Session

Build a Better Mousetrap Competition 2020

People involved in the transportation industry often find better ways to do their jobs. Whether it’s a new gadget that improves the quality and safety of a project, or an innovative process that reduces costs and improves efficiency, it is typically the people on the front lines who discover the latest and best practices!

Now is the time to share those new ideas with others in New Jersey’s Build a Better Mousetrap Competition.

We are looking for submissions from employees of local or state public agencies (municipalities, counties, parks commissions, NJ Department of Transportation, NJ TRANSIT) who have created innovative solutions to problems or found better ways of doing things. The best ideas from around the state will be gathered and judged using a 5-point rating system (cost, benefits to the community, ingenuity, ease of transferability, and effectiveness.)

Based on these criteria, a state winner will be selected from all of the local public agency entries, and that entry will be elevated to the National Build a Better Mousetrap Competition!

This competition is sponsored by the Federal Highway Administration’s Local Technical Assistance Program and Tribal Technical Assistance Program, and winners will be announced at the annual National LTTAP/TTAP Conference in July 2020. A state winner will also be selected from the NJDOT/NJT entries for the 2020 NJDOT Innovator Award, to be presented at the Annual NJDOT Research Showcase in October.

Want to learn more about past winners? See Share Your Ideas – Build a Better Mousetrap.

Ready to Enter?

If you have something you think would qualify for this competition, submit your entry by July 1 (local agency) or August 15 (state agency).

Please include a photo(s) or sketch of your project with submission.

Remember, this competition is open to employees of any local, county, or state  public agency, including New Jersey Department of Transportation and NJ TRANSIT. Two winners will be selected; one for the best local agency and another for the NJDOT/NJT Submission.

Drone Technology at NJDOT

NJDOT’s Unmanned Aerial Systems program in the Bureau of Aeronautics is demonstrating how the adoption of drone technology can serve NJDOT’s goals to increase safety, increase efficiency, save time, and save money. Drones are replacing boots on the ground, increasing accuracy, speeding up data collection, and providing access to hard-to-reach locations for divisions throughout the Department.

Click on the link below to see how drones are being used within NJDOT to drive innovation in the way our agency and workforce operate and what lies ahead for this technology.

Tech Talk! Green Infrastructure in Transportation

Welcome to the NJDOT Bureau of Research Tech Talk!

NJDOT Bureau of Research Tech Talk!

The NJDOT Bureau of Research hosted a half-day Tech Talk! Event, Green Infrastructure in Transportation, that highlighted examples of transportation-related green infrastructure projects that have been planned and implemented for stormwater management and flood protection. The event included speakers from state DOTs, county and local governments, the consulting engineering sector and the policy advocacy community.  The speakers reflected a multi-disciplinary orientation of engineering, planning and environmental science specializations. Their talks touched upon both planning and project implementation activities at the state and local levels that have been undertaken in response to the increasing intensity and frequency of severe weather events and subsequent flooding. Registration was full for this half-day event held in the NJDOT Multipurpose Room on June 5, 2019.

Representatives of New Jersey, Maine and Pennsylvania Departments of Transportation presented Stormwater Best Management Practices to control and treat highway and parking lot runoff. Local agencies in Passaic County and the City of Hoboken presented their priority strategies and actions for addressing stormwater management through the adoption and implementation of Green Infrastructure Strategic Plans. A representative of New Jersey Future, a statewide non-profit advocacy organization that promotes smart growth policies, discussed opportunities to advance green streets throughout New Jersey.

Sandra Blick, P.E., NJDOT, Bureau of Landscape Architecture and Environmental Solutions

Sandra Blick, P.E., NJDOT, Bureau of Landscape Architecture and Environmental Solutions

Sandra Blick, P.E., NJDOT, Bureau of Landscape Architecture and Environmental Solutions.  Ms. Blick provided key background definitions for green infrastructure, descriptions of the elements of green infrastructure, and a brief history of green infrastructure in New Jersey related to state standards, testing and design criteria, and proposed NJDEP rule changes. She also discussed NJDOT’s implementation of green infrastructure best management practices over the past decade, including bio-retention basins and swales, constructed wetlands, infiltration basins, and porous sidewalks, among others. Ms. Blick noted that green infrastructure for roadways involves complex design and construction and requires intensive maintenance. She emphasized that these strategies only work if the water treatment processes continue to function.

Brian Luce, P.E., Maine Department of Transportation, Pavement Quality and Design

Brian Luce, P.E., Maine Department of Transportation, Pavement Quality and Design

Brian Luce, P.E., Maine Department of Transportation, Pavement Quality and Design. Mr. Luce described MaineDOT’s experience with installation of porous asphalt pavement on Maine Mall Road and at the International Marine Terminal (IMT) in Portland, Maine. He described the initial design and construction in 2009 of porous asphalt on Maine Mall Road, a relatively high-traffic segment of roadway, and current road conditions. His talk touched upon the success and durability of the project along with some lessons learned in select distressed sections due to sub-optimal temperatures during construction and the tracking of sands and salts onto porous sections that require patching. Mr. Luce noted that the success of the Maine Mall installation gave Maine DOT the confidence that a similar porous pavement structure could work for a chassis yard pavement project at the IMT to filter pollutants in stormwater runoff before it entered a nearby waterbody. After installation, a storm event provided evidence of the pavement’s effectiveness.  However, a subsequent review of the IMT revealed some raveling at joints and in isolated areas, most likely due to cold air and base temperatures during construction, as well as cooler mix temperatures due to a long haul to the site. The repair techniques that were subsequently required at the IMT site offered lessons, Mr. Luce observed, potentially applicable to the Maine Mall Road when repair and replacement of porous structures are needed.

Edwina Lam, P.E., AECOM

Edwina Lam, P.E., AECOM

Elaine Elbich, P.E., Pennsylvania Department of Transportation and Edwina Lam, P.E., AECOM. In their presentation, “21st Century Stormwater Management: Designing and Building Gray and Green Infrastructure on I-95,” Ms. Elbich and Ms. Lam discussed this highway reconstruction project that slices through Philadelphia along the Delaware River. In addition to designing for stormwater best management practices, they sought to improve waterfront access, lighting, and access to usable green spaces, and described solutions in response to challenges in this urban environment, such as right-of-way, contaminated soils, historic properties, underground utilities, and maintenance. The presenters described the Sustainable Action Committee, formed to coordinate decision-making among agencies and ensure integration of stakeholder and community needs in the design and planning process. Their talk also highlighted the value of an ongoing and productive partnership with Villanova University in providing critical research on the performance of green infrastructure solutions such as rain gardens off an elevated highway as part of their stormwater management solutions. Ms. Lam described the primary stormwater management elements, and the materials and extensive planting involved.

Kandyce Perry, New Jersey Future, Jersey Water Works

Kandyce Perry, New Jersey Future, Jersey Water Works

Kandyce Perry, New Jersey Future, Jersey Water Works. Ms. Perry presented on “GREEN and Complete Streets: Designing Streets for People, Cars, AND Stormwater.” She introduced the New Jersey Future’s New Jersey Green Infrastructure Municipal Toolkit and presented several examples of green infrastructure implementation in New Jersey communities, and potential sites for implementation. She noted that the publication, Complete & Green Streets for All, currently being circulated in draft form, provides a model policy and guide for local agencies for planning and implementing Complete Streets that incorporate green street features. Ms. Perry suggested that NJDOT could support green infrastructure by adding green streets into the state’s Complete Streets policies and programs, prioritizing green streets through the Local Aid grant program, partnering with local agencies on demonstration projects, and integrating green streets into the NJDOT Roadway Design Manual.

Jason Miranda, Passaic County Department of Planning & Economic Development

Jason Miranda, Passaic County Department of Planning & Economic Development

Jason Miranda, Passaic County Department of Planning & Economic Development.  After highlighting the benefits of green infrastructure, Mr. Miranda spoke about the County’s recently undertaken planning process that preceded the adoption of the green stormwater infrastructure element of the Passaic County Master Plan. He discussed the County’s Stormwater Management Guidance Manual and Green Streets Guidelines as key parts of this Master Plan element. Mr. Miranda provided an example of a green streets initiative, the Haledon Avenue Green Streets Pilot Project in the City of Paterson. The County is working on a monitoring plan to evaluate the project and is working with community groups to ensure maintenance. The County has formed a Green Stormwater Infrastructure Committee to identify future projects.

Caleb Stratton, AICP, Chief Resilience Officer, City of Hoboken

Caleb Stratton, AICP, Chief Resilience Officer, City of Hoboken

Caleb Stratton, AICP, Chief Resilience Officer, City of Hoboken.  In his presentation, “Infrastructure as Adaptation,” Mr. Stratton discussed the storm events that resulted in extensive flooding in Hoboken and propelled the development of a citywide Green Infrastructure Strategic Plan to manage stormwater. He emphasized the importance of leveraging funding for road resurfacing and lighting projects to acquire funding to implement green infrastructure projects and mentioned how Hoboken has effectively worked with the state’s infrastructure bank. Hoboken’s green infrastructure strategy defines green infrastructure techniques that address retention, detention, and infiltration in specific areas of the city. He showed examples of rain gardens, pervious pavement, bio-swales, cisterns, and other infrastructure that have been implemented in the city.  This included visualization and photos of green street elements incorporated into street design improvements on First Street and Washington Street to address stormwater. He also referred to the city’s ongoing development of the Hoboken Street Design Guide to guide design and construction of Complete Streets and green streets.

The presenters made several additional points in response to audience questions and comments.

  • The market is driving public/private partnerships that support green infrastructure. In Philadelphia, a development corporation is working with PennDOT to make it easier for people to access the waterfront. The agency is also working with various entities in communities along the project corridor.
  • It is often difficult to determine which green infrastructure alternatives to use but industry is learning. Speakers agreed that green infrastructure will not be the solution in all situations; these projects must pass the benefit/cost test.
  • Green infrastructure installations make extensive use of plant material, at times unsuccessfully due to the effects of contaminants. Research is continuing in order to determine which plants will stand up to the absorption of contaminants, in particular road salts.
  • Planners need to be aware of where water is going once it is collected via stormwater management techniques. Speakers cautioned that water cleaned through such a system may migrate to a contaminated zone.
  • The speakers noted that green infrastructure is increasingly discussed, but implementation varies depending on the capabilities of the transportation agency or engineering firm. The proposed NJDEP rule changes that require inclusion of green infrastructure in future development projects will lead to broader awareness and implementation through the state.
Resources

Green Infrastructure Municipal Toolkit

Green Infrastructure Element of the Passaic County Master Plan

Hoboken Green Infrastructure Strategic Plan

New Jersey Stormwater Best Management Practices Manual

New Jersey Developers’ Green Infrastructure Guide

Philadelphia Innovates on Green Infrastructure (Click here to watch video)

Sandra Blick described elements in NJDOT”s green infrastructure toolbox and emphasized that successful Green Infrastructure requires that treatment processes function after implementation.

Maine DOT’s Brian Luce described the design, performance and lessons learned from installation of porous pavements on Maine Mall Road and at intermodal terminal facility.

Kandyce Perry of NJ Future, a statewide advocacy organization, offered recommendations on how NJDOT could advance green streets into its policies, programs and projects.

Edwina Lam and Elaine Elbich highlighted many of the lessons learned from the integration of green infrastructure design elements into the reconstruction of I-95 in an urban section of Philadelphia.

Caleb Stratton, Chief Resilience Officer for the City of Hoboken, recounted how the commuity is using a City-Wide Green Infrastructure Strategy to prepare for future weather events like Hurricane Irene.

Jason Miranda, Senior Planner for Passaic County, NJ, detailed the process and results of their Green Stormwater Infrastructure Element & Green Streets Pilot Project

Your Roadmap to Transportation Innovation

The NJ STIC Program and innovative initiatives advanced through the program were discussed in a session, “Your Roadmap to Transportation Innovation”, given at the NJ TransAction Conference on April 17, 2019.

Click here to see the presentation and here to see a video included in the presentation on a STIC Incentive Funding Grant project that is focused on testing and advancing connected vehicle technologies to improve road service safety.

 

The Use of Porous Concrete for Sidewalks

In December 2017, a team of researchers at the Center for Advanced Infrastructure and Transportation (CAIT) at Rutgers University published a research study for NJDOT on “The Use of Porous Concrete for Sidewalks.” A porous concrete sidewalk typically consists of a porous concrete slab on top of an open graded stone reservoir layer. A filter fabric is placed between the underlying soil and the reservoir layer. One of the most important benefits of porous concrete is its effectiveness for stormwater management, i.e. improving water runoff quality, reducing stormwater runoff, and restoring groundwater supplies. However, there are concerns related to its construction, cost, maintenance, and durability.

Rodding and finishing of a porous slab. Photo source: Najm, 2017.

The primary objective of the research study was to evaluate the various factors that influence the performance of porous concrete in sidewalks. These include hydraulic performance to meet New Jersey Department of Environmental Protection (NJDEP) regulations and structural performance to meet typical sidewalk strength requirements as well as life-cycle cost and maintenance requirements. The researchers compared the performance of porous concrete in sidewalks with other materials, such as conventional concrete and asphalt alternatives, and tested various pervious concrete mixes to evaluate the hydrological and structural performance and energy budget versus conventional concrete mixes. The team also conducted a cost benefit analysis for use of porous concrete on sidewalks versus alternatives. The study resulted in recommendations and guidelines that NJDOT could use to inform the mitigation of stormwater runoff and development of maintenance standards.

The study found that the effectiveness of porous concrete in reducing stormwater runoff could contribute to cost savings. The research report examined a number of important considerations affecting the broader implementation of this technology. A life-cycle cost analysis of three sidewalk design alternatives—porous concrete, porous asphalt, and conventional concrete—found that porous concrete had the highest initial construction cost, with conventional concrete coming in slightly less, and porous asphalt being the cheapest. The study showed that the service life of porous concrete may be shorter than conventional concrete, driving up the life-cycle cost and potentially offsetting the savings from stormwater management best practices. For porous asphalt, which has the shortest service life, findings showed that if the service life ratio of porous asphalt compared to conventional concrete was greater than 0.60, then porous asphalt would be the most economically competitive option of the three. Another consideration in some areas is that it may be less effective to implement porous pavement if the soil has low permeability. The report notes that, once implemented, periodic maintenance is required to prevent clogging from debris and sediments, and freezing in the winter to avoid failure due to freeze and thaw cycles.

Porous concrete beam during flexural test. Photo source: Najm, 2017

The research team recommended that next steps should include construction of a porous concrete sidewalk and a porous asphalt sidewalk for long- and short-term performance testing. They noted that implementation should include geotechnical evaluation of the subsoil layers for infiltration rates, hydraulic design and storm-runoff analysis, selection of porous mix design based on NJDOT specifications and contractor recommendations, sample prisms and cylinders extracted for lab tests, scheduled maintenance based on NJDEP and NJDOT guidelines, and regular inspection. While there are environmental benefits to the implementation, such as filtration of contaminants like metals, oils and grease, to improve water quality and reduce chloride pollution, there are also concerns it can cause groundwater contamination. These concerns, along with recommended further performance testing, highlight the importance of interim steps before wider implementation.

Pervious pavement is a key component of green infrastructure methods that seek to improve stormwater management. The New Jersey Department of Environmental Protection lists the practice among others such as rain barrels, cisterns, and rain gardens/bioretention basins as strategies that can be implemented on a variety of scales in order to both treat runoff and reduce runoff volume. Yet, as the report notes, there has been little published research on performance and practical experience in the United States, highlighting the researchers’ final recommendation for further testing.

Sources

Green Infrastructure in New Jersey. (2018). Retrieved from https://www.nj.gov/dep/gi/More_Info.html

Najm, H., Wang, H., Miskewitz, R., Roda, A. M., Ali, A., He, H., Chen, X., Hencken, J. (2017). The Use of Porous Concrete for Sidewalks. Retrieved from https://www.state.nj.us/transportation/refdata/research/reports/FHWA-NJ-2018-001.pdf

Najm, H., Wang, H., Miskewitz, R., Roda, A. M., Ali, A., He, H., Chen, X., Hencken, J. (2017). Technical Brief: The Use of Porous Concrete for Sidewalks. Retrieved from https://www.state.nj.us/transportation/refdata/research/reports/FHWA-NJ-2018-001-TB.pdf

NJDOT Awarded Accelerated Innovation Deployment Grant to Start Weather-Savvy Roads Pilot Program

The Federal Highway Administration has awarded NJDOT a $322,461 Accelerated Innovation Deployment (AID) Demonstration grant to “start a ‘weather-savvy roads’ pilot program to improve roadway safety and operational efficiency.”

Preliminary plans include equipping up to 20 NJDOT road maintenance vehicles with dash-mounted cameras and weather sensors, which will feed real-time data directly to NJDOT year-round. The data will support improved awareness of road conditions and faster response times during weather events.[1] New Jersey’s winter season includes frequent precipitation, making for slick road conditions and added congestion. The data retrieved from the cameras and sensors will help quicken operations and also enhance deployment of incident management strategies.

This is the first AID grant applied for through New Jersey’s State Transportation Innovation Council (STIC). This year, FHWA awarded $8.4 million to nine states for work on innovative highway and bridge projects to improve safety and operational efficiency.

Importance of Weather-Responsive Management Strategies

Weather effects on our nation’s roads have enormous social and economic costs. According to the FHWA, 1.2 million (or 21 percent) of the more than 5.7 million vehicle crashes over the past 10 years were weather-related. Nearly 6,000 people are killed and over 445,000 are injured in weather-related crashes each year. In terms of mobility, the weather is responsible for 25 percent of non-recurring delays as well as congestion costs of up to $9.5 billion per year for 85 urban areas[2] and $3.4 billion in freight costs.

To address these problems, states can implement weather-responsive management strategies, which have many benefits including reducing crash risks and delays, lowering negative environmental impacts by minimizing road salt use, and enabling travelers to make better driving decisions.

In recent years, the FHWA Road Weather Management Program has focused on using mobile observations and connected vehicle data to support traffic and maintenance management. States such as Nevada, Michigan, and Minnesota have already implemented winter maintenance/anti-icing strategies using “Integrating Mobile Observations” (IMO), which involves collecting weather and road condition data from government fleet vehicles. Pathfinder, another solution, is a collaborative strategy across state DOTs to disseminate road weather information for proactive transportation system management ahead of, and during, adverse weather events.

Every Day Counts and State Transportation Innovation Councils

The AID program works closely with the FHWA Every Day Counts (EDC) program to foster a culture of innovation. Every two years, FHWA works with state DOTs and other public and private stakeholders to identify new sets of innovative technologies that merit widespread deployment to address transportation challenges. State Transportation Innovation Councils (STICs) from all fifty states then meet to evaluate these innovations and lead deployment efforts.

Weather management was named a priority in recent years. In 2017-2018 the fourth round of EDC (EDC-4) cited11 innovations including “Road Weather Management – Weather-Savvy Roads.” In 2018-2019, EDC-5 identified 10 innovations including “Weather-Responsive Management Strategies.

See the FHWA’s Innovation Spotlight video on Road Weather Management: Weather Savvy Roads.