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Field Study Shows Routes of Connected Snowplows Had a Larger Reduction in Roadway Crash Rates (up to 3.87) than their Non-Equipped Counterparts (1.82).

METHODOLOGY The study consisted of a field test over the months of October 2019 to March 2020 along five V2X-equipped corridors in the Salt Lake City metropolitan area. Data was collected during and…
Content type
Benefit
Date Posted
05/26/2023
Taxonomy (ARC-IT) Weather Data Collection (WX01)
Geolocation links
Salt Lake City, Utah, United States

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
Benefit
Date Posted
02/28/2023
Taxonomy (ARC-IT) Transit Signal Priority (PT09), Connected Vehicle Traffic Signal System (TM04)
Geolocation links
Salt Lake City, Utah, United States

Utah's Incident Management Team Program Improved the Incident Response Rate within 15 Minutes of a Crash Occurring by 12.1 Percent After a Program Extension that Enabled the Use of Both Incident-related Data and Computer-Aided Dispatch Logs.

METHODOLOGY Performance measures studied included Roadway Clearance Time (RCT) and Incident Clearance Time (ICT), as well as Response Time (RT). These performance measures were calculated for IMT…
Content type
Benefit
Date Posted
06/30/2022
Taxonomy (ARC-IT) Emergency Call-Taking and Dispatch (PS01), Emergency Response (PS02), Traffic Incident Management System (TM08)
Geolocation links
Utah, United States

To Maximize Route Diversion by Drivers Approaching Major Crash Incidents, Display Combined Standardized Messages with “Prepare to Stop” Along with Miles to the Crash on Variable Message Signs.

Select standardized message content specifically chosen to encourage or reduce diversion according to the desired goal. Informing drivers of a crash or traffic ahead, the number of miles to crash,…
Content type
Lesson
Date Posted
06/21/2022
Taxonomy (ARC-IT) Traffic Information Dissemination (TM06)
Geolocation links
Statewide, Utah, United States

Ninety-four (94) Percent of Automated Shuttle Pilot Project Riders Surveyed in Utah Felt Safe During Fully Automated Shuttle Operations.

METHODOLOGY Two surveys were conducted during the project period to better understand the passenger experience and the opinions of the general public regarding automated shuttles. The first survey…
Content type
Benefit
Date Posted
04/29/2022
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), Automated Vehicle Operations (VS16)
Geolocation links
Utah, United States

Addition of High-Intensity Activated Crosswalk Pedestrian Enhancement Estimated to Lower Odds of Driver Non-Compliance by 37.6 Times Compared to Standard Marked Crosswalk.

Methodology Data were collected in 2018 via video recordings and site visits at 17 marked crosswalk locations which met Annual Average Daily Traffic (AADT), number of lanes, and posted speed limit…
Content type
Benefit
Date Posted
02/28/2022
Taxonomy (ARC-IT) Vulnerable Road User Safety (VS12)
Geolocation links
Utah, United States

Changing Variable Speed Limit Signs from White to Amber Legend Decreased Crashes by Approximately 50 Percent and Increased Driver Compliance by Nine Percent in Utah.

METHODOLOGY Researchers collected data on a biweekly basis during October 2018, October 2019, January 2019, and January 2020. Vehicle travel speeds and traffic flow data were collected from…
Content type
Benefit
Date Posted
02/24/2022
Taxonomy (ARC-IT) Variable Speed Limits (TM20), Spot Weather Impact Warning (WX03)
Geolocation links
Utah, United States

Case Study Showed Transit Signal Priority Improved Bus System On-Time Performance, Schedule Deviation, and Travel Time as Bus Priority Request Lead Times Approached Zero.

METHODOLOGY Bus performance in this study was evaluated based on (i) on-time performance (OTP), (ii) schedule deviation, (iii) travel time, and (iv) dwell time; and the general traffic analysis was…
Content type
Benefit
Date Posted
02/24/2022
Taxonomy (ARC-IT) Transit Signal Priority (PT09)
Geolocation links
Salt Lake Valley, Utah, United States
ITS Deployment Evaluation

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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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