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Wyoming DOT's Connected Vehicle Pilot Deployment Study Estimated a Savings of 46.5 Gallons of Diesel in Idling for Trucks Per Road Closure.

METHODOLOGY In this study, the input-output analysis took into account capacity and demand to estimate the total amount of delay associated with closing sections of I-80. The researchers used Average…
Content type
Date Posted
06/30/2023

The Wyoming CV Pilot Found that Over 50 Percent of Drivers Given a Work Zone or Winter Weather Alert Reduced their Speed.

METHODOLOGY The study utilized a “Before-After” approach to quantitatively compare corridor data under baseline conditions (collected from December 2016 - November 2017) with data collected during…
Content type
Date Posted
04/03/2023

Dynamic Message Signs Displaying Weather Alerts Based on Roadside Pavement Sensors Were Associated with Up to a 1.5-mph Reduction in Average Speed and 2.0-mph Reduction in 85th-Percentile Speed.

Methodology Data related to 14 winter weather events, gathered during the 2020-2021 winter season, were used to analyze driver behavior. To evaluate the effectiveness of the system on influencing…
Content type
Date Posted
09/29/2022

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
Date Posted
02/24/2022

Simulation Study Estimates a Combination of Connected Vehicle Control and Variable Speed Limit Strategies Can Reduce Rear-End Crash Risk under Fog Conditions by 48.7 Percent.

Methodology In the driving simulation, throttle release time, brake transition time, perception response time, brake reaction time, minimum modified time-to-collision, and maximum brake pedal…
Content type
Date Posted
02/21/2022

Crashes during Snow Events Declined 42 Percent after Winter Season Variable Speed Limit Corridor Implementation in Ohio.

Methodology ODOT conducted an analysis of winter season crash and incident data from before the VSL deployment (2014-2016) compared with the first two winter seasons after deployment (2017-…
Content type
Date Posted
06/21/2021

Minnesota DOT Uses Connected Arrow Boards to Improve Traveler Information and Lane Closure Information Accuracy at an Estimated Annual Cost of $16,560.

Starting in April 2018, Minnesota DOT (MnDOT) tested the integration of lane closure messages from 20 connected arrow boards with the agency's existing Advanced Traffic Management System (ATMS)…
Content type
Made Public Date
04/30/2021