Displaying 1 - 10 of 71

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Thirty-Seven (37) Audible Emergency Preemption Systems Installed as Part of the Regional Traffic Signal Program (RTSP) Helped Reduce Emergency Response Time by 14 to 23 Percent.

METHODOLOGY A benefit-to-cost analysis was performed for the first year after installation of the third cycle of projects. There were 148 signals upgraded across the 15 different corridors with AADT…
Content type
Date Posted
11/29/2023

Automated Speed Enforcement Decreased Crashes by 36 Percent from 2019 to 2021 on Roosevelt Blvd in Philadelphia, While Falling Only Six Percent Citywide.

METHODOLOGY Before-and-after analysis (2019 vs 2021) was conducted to determine the effectiveness of the ASE implementation. To isolate the results of this intervention versus other factors, crash…
Content type
Date Posted
06/29/2023

Risk Analysis Using Crash and Near-Crash Data Finds a 26 Percent Reduction in Likelihood of a Crash Involving Severe Injuries in a Connected Vehicle Versus a Vehicle with More Traditional Line of Sight System.

METHODOLOGY The study utilized the SHRP2 NDS database that consisted of over 5.5 million trips driven by 3,542 drivers across six sites in the U.S. First, relevant events from the database were…
Content type
Date Posted
04/24/2023

The Initial Projected Annualized Costs To Implement and Operate Shared Fully Automated Mobility Services Ranged From $125,000 to $1,934,000 per Census Block Group (CBG) in Four Large U.S. Cities.

This study evaluated transit systems in various cities to identify opportunities for equitable improvement through shared automated mobility. For this purpose, locations of unmet transit demand among…
Content type
Made Public Date
01/25/2023

A Simulation Model Indicated That Shared Automated Vehicles and Fully Automated Electric Shuttles Can Improve Transit Coverage in Large Cities by 13 to 315 Percent.

METHODOLOGY In this study, transit stops, routes, and service frequency data from the standardized General Transit Feed Specification (GTFS) were used to determine the transit supply score for each…
Content type
Date Posted
12/15/2022

Crashes Involving Freeway Maintenance Vehicles Responding to Incidents in Pennsylvania Decreased from 30 in 2018 to Zero in 2020 in Areas Where Agency Vehicles Broadcast Real-Time Incident Alert Messages to Traveler Information Services and In-vehicle Nav

METHODOLOGY When a traffic incident is detected, the service vehicle activates its vehicle mounted amber emergency warning lights and send a signal to the map and navigation service provider. The map…
Content type
Date Posted
10/20/2022

Supplement Mobile Pedestrian Apps with Stationary Bluetooth Beacons to Achieve Reliable Corner Identification and Enhance Overall Localization.

Lessons learned were summarized from the study based on the practical challenges of the participants. According to the pedestrian’s type of disability, different limitations and challenges were…
Content type
Date Posted
03/25/2022

To Build Credibility and Trust for Accessible Transportation Technologies, Address Needs in Application Interaction and Integration with Mobile Platforms before Deploying with Target Populations.

Address digital service delivery needs to build credibility and trust with the target population. Three emerging problems appeared with the mobile application related to digital service delivery,…
Content type
Date Posted
03/08/2022

Engage the Community and Build Trust to Successfully Implement Bike Sharing Systems.

As part of this trend, the City of Philadelphia launched its Indego bike sharing system in 2015. During the launch, the City of Philadelphia sought to make sure that its bike sharing was…
Content type
Date Posted
11/30/2021