United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-01-01
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A Mobility Marketplace is a digital platform that integrates multimodal supply for personal mobility and goods delivery services into a trusted venue for consumers to plan, reserve, and purchase services that meet their current needs. Implementing a Mobility Marketplace with an IEPS allows a traveler to pay for an entire trip generated by the Mobil
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United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-01-01
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PDF
The U.S. Department of Transportation (U.S. DOT) uses the term MOD to represent its vision for future mobility. MOD envisions a safe, reliable, and carefree mobility ecosystem that supports complete trips for all, both personalized mobility and goods delivery. The U.S. DOT achieves this vision by leveraging innovative technologies and facilitating
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Median barriers are longitudinal barriers that separate opposing traffic on a divided highway and are designed to redirect vehicles striking either side of the barrier. Median barriers significantly reduce the number of cross-median crashes, which are attributed to the relatively high speeds that are typical on divided highways. AASHTO’s Roadside D
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Horizontal curves account for 27 percent of all fatal crashes and 80 percent of all fatal crashes at curves are roadway departure crashes.1 Roadside design improvements at curves is a strategy encompassing several treatments that target the high-risk roadside environment along the outside of horizontal curves. These treatments can reduce roadway de
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Longitudinal rumble strips are milled or raised elements on the pavement intended to alert drivers through vibration and sound that their vehicle has left the travel lane. They can be installed on the shoulder, edge line, or at or near the center line of an undivided roadway. Rumble stripes are edge line or center line rumble strips where the pavem
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Roadway departures account for over half of all traffic fatalities in the United States. If drivers cannot clearly identify the edge of the travel lanes and see the road alignment ahead, the risk of roadway departure may be greater. Wider edge lines enhance the visibility of travel lane boundaries compared to traditional edge lines. Edge lines are
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
The SafetyEdgeSM technology shapes the edge of the pavement at approximately 30 degrees from the pavement cross slope during the paving process. This safety practice eliminates the potential for vertical drop-off at the pavement edge, has minimal effect on project cost, and can improve pavement durability by reducing edge raveling of asphalt.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
A Road Diet, or roadway reconfiguration, can improve safety, calm traffic, provide better mobility and access for all road users, and enhance overall quality of life. A Road Diet typically involves converting an existing four-lane undivided roadway to a three-lane roadway consisting of two through lanes and a center two-way left-turn lane (TWLTL).
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
A leading pedestrian interval (LPI) gives pedestrians the opportunity to enter the crosswalk at an intersection 3-7 seconds before vehicles are given a green indication. Pedestrians can better establish their presence in the crosswalk before vehicles have priority to turn right or left.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
A walkway is any type of defined space or pathway for use by a person traveling by foot or using a wheelchair. These may be pedestrian walkways, shared use paths, sidewalks, or roadway shoulders.
The Safe System Strategic Plan provides a roadmap for the advancement of the Safe System Approach in the U.S. It describes the Safe System Approach, discusses the process involved in building the plan, outlines how to advance a Safe System mindset, and describes steps necessary to implement Safe System practices within the transportation community
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Auxiliary turn lanes—either for left turns or right turns—provide physical separation between turning traffic that is slowing or stopped and adjacent through traffic at approaches to intersections. Turn lanes can be designed to provide for deceleration prior to a turn, as well as for storage of vehicles that are stopped and waiting for the opportun
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Access management refers to the design, application, and control of entry and exit points along a roadway. This includes intersections with other roads and driveways that serve adjacent properties. Thoughtful access management along a corridor can simultaneously enhance safety for all modes, facilitate walking and biking, and reduce trip delay and
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-01-01
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PDF
Backplates added to a traffic signal head improve the visibility of the illuminated face of the signal by introducing a controlled-contrast background. The improved visibility of a signal head with a backplate is made even more conspicuous by framing it with a 1- to 3-inch yellow retroreflective border. Signal heads that have backplates equipped wi
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United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-01-01
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PDF
The Federal Highway Administration (FHWA) broadly defines micromobility as “any small, low-speed, human- or electric-powered transportation device, including bicycles, scooters, electric-assist bicycles, electric scooters (e-scooters), and other small, lightweight, wheeled conveyances” [1]. Most typically, travelers do not own micromobility vehicle
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United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-01-01
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PDF
Transportation management centers (TMCs) operate as the hub of the surface transportation system and are responsible for operating the latest Intelligent Transportation System (ITS) technology, including data collection, command and control of ITS devices, incident response, and communication for transportation networks. TMCs are the focal point fo
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United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-01-01
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PDF
The increasing use of three-dimensional (3D) model-based workflows and the rapid advancement in computer-interface design and hardware have enabled technologies like virtual reality (VR) and augmented reality (AR) to support a variety of transportation use cases [1]. While VR provides a complete virtual replacement to the visual world, AR overlays
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Colorado Department of Transportation (CDOT) is engaged in numerous efforts to incorporate resiliency into operations. The agency has produced reports and informational guidance on integrating resiliency, undergone a pilot study analyzing asset data, adopted a resiliency Policy Directive, and created a manual for conducting risk and resiliency anal
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The Federal Highway Administration (FHWA) partnered with eleven pilot project teams to assess and deploy resilience solutions. This case study is part of a series that summarizes the pilot projects and highlights transportation system resilience efforts at other agencies across the country. For more information, visit https://www.fhwa.dot.gov/envir
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The Federal Highway Administration (FHWA) partnered with eleven pilot project teams to assess and deploy resilience solutions. This case study is part of a series that summarizes the pilot projects and highlights transportation system resilience efforts at other agencies across the country. For more information, visit https://www.fhwa.dot.gov/envir
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