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Advanced Queue Detection System Using Portable Dynamic Message Signs Reduced Speeds of Vehicles Approaching Interstate Work Zones in Nebraska by up to Seven Miles Per Hour.

METHODOLOGY In this study, portable traffic data capturing units, consisting of cameras and Wi-Fi receivers as detectors, were utilized through a private company. Cameras within the portable units…
Content type
Benefit
Date Posted
06/30/2023
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), En-Route Guidance (TI03), Queue Warning (VS08)
Geolocation links
Statewide, Nebraska, United States

The Annual Cost for Collecting Highway Performance Monitoring System (HPMS)-Recommended Traffic Counts on Local and Minor Collector Roadways in Small Urban Areas Was Estimated to be $3,145 for 51 Monitoring Locations.

Reliable traffic volume data is important for a DOT to understand the quality of safety and mobility on its roads. California uses permanent sensors to collect data on its roads of functional class (…
Content type
System Cost
Made Public Date
05/30/2023
Taxonomy (ARC-IT) Performance Monitoring (DM02)
Geolocation links
Statewide, California, United States

A Study on an E-Bike Rebate Programs Using Survey Data in Northern California Estimates a Reduction Between 12 and 44 Kilograms of CO2 Equivalent Emissions per Person Each Month.

METHODOLOGY In this study, participants from three e-bike rebate programs completed an online follow-up survey after receiving their rebates. They provided information on demographics, travel…
Content type
Benefit
Date Posted
05/30/2023
Taxonomy (ARC-IT) Shared Use Mobility and Dynamic Ridesharing (TI06)
Geolocation links
Statewide, California, United States

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
Benefit
Date Posted
04/03/2023
Taxonomy (ARC-IT) Road Weather Information for Freight Carriers (CVO10), V2V Basic Safety (VS02), Situational Awareness (VS03), Road Weather Motorist Alert and Warning (VS07), Reduced Speed Zone Warning / Lane Closure (VS09), Spot Weather Impact Warning (WX03)
Geolocation links
Statewide, Wyoming, United States

Implement a Quality Check Process with Active Participation by Agency Staff and Partnering with User Community for Detecting Inaccurate System-Generated Traveler Information Messages.

Use existing standards in the system architecture and design process. It is important to ensure a common understanding and interpretation of standards by the technology vendors and application…
Content type
Lesson
Date Posted
11/30/2022
Taxonomy (ARC-IT) Broadcast Traveler Information (TI01), Road Weather Motorist Alert and Warning (VS07)
Geolocation links
Statewide, Wyoming, United States

A Simulation Study Estimates That Communications between Vehicles and Vulnerable Road Users Could Potentially Reduce 97 Percent of Crashes Where Vehicles Are Turning into the Path of a Pedestrian or Bicyclist.

Methodology Crash data from 20 cities with high crash rankings (provided by the California Office of Traffic Safety) were compiled using a five-year (2014-2018) statewide dataset from the California…
Content type
Benefit
Date Posted
10/31/2022
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), Vulnerable Road User Safety (VS12)
Geolocation links
Statewide, California, United States

A Statewide Adverse Weather Forecasting Model in Montana Using Road Weather Information System Measurements Improved Forecasting Accuracy by 32 Percent.

METHODOLOGY The RWIS site observations were collected through a data access webpage from January 1 to March 31, 2020 and October 2020 to March 2021 from 72 sites across Montana. The data collected…
Content type
Benefit
Date Posted
10/26/2022
Taxonomy (ARC-IT) Winter Maintenance (MC04), Weather Data Collection (WX01)
Geolocation links
Statewide, Montana, 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

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
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