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Communication System Upgrade for Cleveland Regional Transit Authority Increased Data Transmission Frequency by 75 Percent, Leading to More Reliable Real-time Data.

METHODOLOGY The communications system upgrades outlined in this study included radio replacement within the transit vehicles, on-board computer equipment installation, and the utilization of Multi-…
Content type
Benefit
Date Posted
04/25/2024
Taxonomy (ARC-IT) Transit Vehicle Tracking (PT01), Transit Fixed-Route Operations (PT02), ITS Communications (SU07)
Geolocation links
Cleveland, Ohio, United States

A Variable Speed Limit (VSL) System Using an AI-Based Algorithm on I-24 in Nashville Reduced Traffic Speed Variations by 32.7 Percent to Improve Safety with Limited Impacts on Vehicle Hours of Delay (VHD).

METHODOLOGY Researchers obtained data from commonly available Radar Detection Systems (RDS) on highways to shape the state input of each VSL controller unit. Regarding the action space of the agents…
Content type
Benefit
Date Posted
04/23/2024
Taxonomy (ARC-IT) Variable Speed Limits (TM20)
Geolocation links
Nashville, Tennessee, United States

Microsimulation Study Revealed Road Automation with Level Five Automated Vehicles Can Lead to up to 27 Percent Travel Time Savings.

METHODOLOGY This study evaluated the impacts of 100 percent CAV penetration on travel times and vehicle delays, applying the German Highway Capacity Manual's delay-flow relations and updating them…
Content type
Benefit
Date Posted
03/31/2024
Taxonomy (ARC-IT) Automated Vehicle Operations (VS16)
Geolocation links
Karlsruhe, Germany   |   Graben-Neudorf, Germany

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
Benefit
Date Posted
01/29/2024
Taxonomy (ARC-IT) Connected Vehicle Traffic Signal System (TM04), Autonomous Vehicle Safety Systems (VS01)
Geolocation links
Florida, United States

Demand-Based Pricing Strategy in Los Angeles Parking Management System Led to a 37 Percent Reduction in Parking Duration for Downtown LA.

METHODOLOGY The LA Express Park program relied heavily on hardware, including parking meters, guidance systems, in-ground sensors, and a highly integrated back-end system that utilized strong data…
Content type
Benefit
Date Posted
01/26/2024
Taxonomy (ARC-IT) Parking Space Management (PM01), Road Use Charging (TM11)
Geolocation links
Los Angeles, California, United States

Implementation of demand-based pricing parking management to San Francisco on-street and off-street parking resulted in a 43 percent decrease in time searching for a parking space and a 30 percent decline in greenhouse gas emissions.

METHODOLOGY This pilot involved demand-based parking pricing to on-street and off-street spaces in the pilot area. Hourly rates were adjusted based on the occupancy rate of the parking area. The…
Content type
Benefit
Date Posted
01/25/2024
Taxonomy (ARC-IT) Parking Space Management (PM01), Regional Parking Management (PM04), Loading Zone Management (PM06)
Geolocation links
San Francisco, California, United States

A Managed Lane Toll System’s Planned Expansion in Minnesota Was Estimated to Save Users More Than $14M Annually in Total Costs, Including Reduced Travel Time, Crashes, and Vehicle Operation.

METHODOLOGY This study used demographics and traffic data from existing E-ZPass and managed lanes facilities in the study area to perform the equity analysis for the planned expansion of the existing…
Content type
Benefit
Date Posted
12/26/2023
Taxonomy (ARC-IT) Road Use Charging (TM11)
Geolocation links
Minnesota, United States

Simulation Study of Miami Beach Network Revealed a 4.1 Percent Modal Shift to Transit with Combined Light Rail and Road Pricing Strategy, Compared to 0.5 Percent with Light Rail Alone.

METHODOLOGY The research team developed various models to accomplish the intended goals of this study:  A base microsimulation model of the Miami Beach network was calibrated using a mode split…
Content type
Benefit
Date Posted
12/26/2023
Taxonomy (ARC-IT) Multi-modal Coordination (PT14), Road Use Charging (TM11), Shared Use Mobility and Dynamic Ridesharing (TI06)
Geolocation links
Miami Beach, Florida, United States   |   Birmingham, Alabama, United States

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
Benefit
Date Posted
11/29/2023
Taxonomy (ARC-IT) Emergency Vehicle Preemption (PS03), Traffic Signal Control (TM03), Regional Traffic Management (TM07)
Geolocation links
Pennsylvania, United States
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