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Conduct Durability Tests to Ensure Antenna Mounting Supports Proper Connected Vehicle Communications for Large Vehicles.

Conduct interoperability test to identify potential issues that would require resolution prior to the sites advancing to an operational phase. The three-day testing event was a major victory for the…
Content type
Date Posted
02/29/2024

Microsimulation of A Signalized Intersection in Florida Estimated that Connected Vehicles Can Reduce Travel Times by up to 17 Percent at Full Penetration Due to Increased Likelihood of Arriving-On-Green.

METHODOLOGY The study leveraged the existing application programming interface (API) capabilities of the traffic simulation tool to emulate the CAV operations. Three simulation cases were considered…
Content type
Date Posted
01/29/2024

Connected and Automated Vehicles (CAVs) Using Eco-Friendly Traffic Optimization Systems Can Reduce Fuel Consumption up to 15 Percent and Waiting Time Up to 85 Percent at Equipped Intersections.

METHODOLOGY The ECoTOp system co-optimizes traffic signal and vehicle dynamics to maximize the throughput from all phases in the cycle and minimize the total energy consumption of each CAV in all the…
Content type
Date Posted
05/30/2023

Transit Signal Priority (TSP) Communications Logged Between Buses and Signal Controllers Improved Planning for Signal Retiming Efforts at 30 Signalized Intersections in Salt Lake County, Utah Which Improved Bus Run-Time Reliability Up to 2.7 Percent.

METHODOLOGY For this CV-based TSP application, DSRC radios from four vendors were installed at 30 intersections and on several buses for communication between vehicles and roadside infrastructure.…
Content type
Date Posted
02/28/2023

Deploy Intersection Roadside Computers that Can Handle the Highly Demanding Pipeline for Real-time LiDAR Processing.

The lessons learned from the deployment of the RIO system were from development experiences, and the performance of the system with respect to the project goals and effects on vehicular and…
Content type
Date Posted
02/24/2023

Automated and Connected Vehicles Tested with Real-time Intersection Optimizer Resulted in User Delay Reductions Between 7.7 and 14.1 Seconds.

METHODOLOGY For the simulation case study, the average network delay improvement (the actuated delay minus the RIO Signal Solver delay) was assessed for 12 scenarios with four demand patterns,…
Content type
Date Posted
02/20/2023

Conduct Electromagnetic Compatibility Analysis When Retrofitting Transit Vehicles With Connected Vehicle Communications Hardware To Ensure They Can Perform as Configured in Their Intended Environments.

Consider developing a custom hardware product to fit specific needed parameters. A custom ruggedized automotive grade computer was developed for the study by a third-party contractor to incorporate…
Content type
Date Posted
09/15/2022

A Pedestrian Crossing Warning System in Cleveland that Included 24 Buses and Three Instrumented Intersections Reduced Bus Driver Reaction Time to Pedestrian Conflicts by 19 Percent.

METHODOLOGY The buses operated in revenue service for a period of six months, from February to August in 2018. During the first month, the IVS was put into “cloaked” mode (i.e., the system did not…
Content type
Date Posted
09/15/2022

The Price of an Enhanced Pedestrian Crossing Warning System that Equipped 24 Buses and Three Instrumented Intersections Was Estimated at $359,441.

Federal Transit Administration (FTA) developed an enhanced version of the Transit Safety Retrofit Package (TRP) system that was originally part of the United States Department of Transportation (…
Content type
Made Public Date
11/15/2022

Simulation Results Suggest That Connected Automated Vehicle (CAV) Applications That Support Traffic Optimization on Signalized Corridors Can Reduce Vehicle Stops, But Have Limited Impacts on Overall Travel Times and Delay.

METHODOLOGY An off-the-shelf microscopic simulation tool with advanced programming interface capabilities was selected to support the development and assessment of TOSCo functionality. Performance…
Content type
Date Posted
05/31/2022