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Perform Unmanned Aerial Vehicle (UAV)-Aided Bridge Inspections in Spring or Summer to Avoid Thin Branches that Could Reduce the UAV's Obstacle Avoidance Capabilities.

Optimize UAV-aided bridge Inspections by timing them in Spring or Summer to avoid thin branches that could reduce the UAV's vision-based obstacle avoidance capabilities. More leaves and denser…
Content type
Lesson
Date Posted
04/25/2024
Taxonomy (ARC-IT) Infrastructure Monitoring (MC09)
Geolocation links
Douglasville, Georgia   |   Calhoun, Georgia

Signal Priority Tested on Connected School Buses in Fulton County Resulted in a 40.4 Percent Decrease in Number of Stops and 13.3 Percent Reduction in Travel Time.

METHODOLOGY The study collected data in 2022 for a month prior to deployment of the technology, and then another month while the CV technology was implemented. Data for the analysis was collected…
Content type
Benefit
Date Posted
11/17/2023
Taxonomy (ARC-IT) Transit Signal Priority (PT09)
Geolocation links
Alpharetta, Georgia, United States

Connected Vehicle Technology Was Deployed on School Buses and at Intersections in Georgia For Approximately $5,000 per Bus and $5,000 per Intersection.

Traffic signal priority (TSP) granted by communications between connected vehicles and the infrastructure has the potential to increase the mobility and efficiency of designated vehicles. Connected…
Content type
System Cost
Made Public Date
11/17/2023
Taxonomy (ARC-IT) Transit Signal Priority (PT09)
Geolocation links
Alpharetta, Georgia, United States

Simulation Results Revealed a V2I-based Speed Advisory System Increased the Minimum Time to Collision by an Average of 1.2 Seconds.

METHODOLOGY This study examined the effects of varying levels of SAS MPR (0%, 25%, 50%, 75%, 100%) on rear-end collision risks. Real vehicle trajectories, vehicle lengths, and signal timing were…
Content type
Benefit
Date Posted
03/24/2023
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Atlanta, Georgia, United States

Combined Variable Speed Limit and Ramp Metering System along the Atlanta Beltway Estimated to Reduce Total Travel Time by About Eight Percent.

METHODOLOGY This study proposed a combined VSL-RM algorithm designed to maximize freeway capacity by mitigating the capacity drop phenomenon at merge bottlenecks. The optimal speed of the VSL-RM…
Content type
Benefit
Date Posted
03/22/2023
Taxonomy (ARC-IT) Traffic Metering (TM05), Variable Speed Limits (TM20)
Geolocation links
Atlanta, Georgia, United States

Before-and-After Study of Freeway Variable Speed Limit Installations Estimated Crash Reductions of 34 Percent in Wyoming and 29 Percent in Georgia.

Methodology The potential to reduce crashes was assessed by estimating crash modification factors (CMFs) associated with the safety improvement strategy in terms of total, fatal, and injury, and…
Content type
Benefit
Date Posted
06/16/2022
Taxonomy (ARC-IT) Variable Speed Limits (TM20)
Geolocation links
Statewide, Georgia, United States   |   Statewide, Virginia, United States   |   Statewide, Wyoming, United States

Simulation Study Finds That an Optimized Variable Speed Limit and Ramp Metering Strategy Could Reduce Overall Travel Time at Two Merge Bottlenecks by 3 to 4 Percent.

Methodology The GTsim microsimulation package was used in the analysis along with one month of traffic data (volume, speed, and occupancy at 20-second intervals) from February 2019 from Georgia…
Content type
Benefit
Date Posted
03/23/2022
Taxonomy (ARC-IT) Traffic Metering (TM05), Variable Speed Limits (TM20)
Geolocation links
Dekalb County, Georgia, United States

Determine Whether Privacy is a Concern and Employ Reasonable Precautions to Avoid Capturing Images of Civilians Before Utilizing Unmanned Aerial Systems to Improve Operations.

Determine whether privacy is a concern when planning flights and what safety precautions are needed when operating near civilians, then implement a liability management strategy. UAS pilots in…
Content type
Lesson
Date Posted
03/21/2022
Taxonomy (ARC-IT) Infrastructure Monitoring (MC09), Transportation Infrastructure Protection (PS09)
Geolocation links
Georgia, United States
ITS Deployment Evaluation

INTELLIGENT TRANSPORTATION SYSTEMS JOINT PROGRAM OFFICE

1200 New Jersey Avenue, SE
Washington, DC 20590

its.dot.gov

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U.S. Department of Transportation Office of the Assistant Secretary for Research and Technology (OST-R)
 
 
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