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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
Date Posted
05/26/2023
Taxonomy (ARC-IT) Weather Data Collection (WX01)

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
Date Posted
10/26/2022

Use Mobile Road Weather Information Sensors and Maintenance Decision Support Systems to Reduce Material Usage and Increase Cost Savings for Winter Road Maintenance Operations.

Use mobile RWIS and MDSS to reduce material usage and increase cost savings. CDOT reported that districts that used mobile RWIS reported an approximate 20 percent reduction in material usage,…
Content type
Date Posted
05/31/2022

Look to Braking and Wheel Counter Information from Vehicle Controller Area Network (CAN) Data for Early Indication of Winter Conditions.

Use hard braking and wheel counter data as an early indicator of winter conditions. The study successfully piloted an integrated CAN bus system to monitor road conditions in real-time, and these…
Content type
Date Posted
04/26/2022

Idaho Storm Warning System Operational Test - Final Report

Notes:   On April 11, 1996, the speed limit in the project area was increased from 65 to 75 mi/h for cars and trucks. In 1998, truck speeds were reduced to 65 mi/h. This change did not…
Content type

The signal quality and message integrity of DSRC-based V2V applications that alert drivers of reduced visibility and dangerous road weather conditions are maintained even in foggy environments.

The results of the simulation indicated that a DSRC signal with a wavelength of 0.05 meter will persist in its integrity and quality while propagated through a foggy environment under a wide range of…
Content type
Date Posted
12/30/2019

A simple decision tree model was preferred over more complex regression and neural network models when predicting winter road weather conditions in Iowa.

Data Governance is very important Alongside the development of the algorithm, a user-interface was developed to communicate information produced by the algorithm. During testing, it was discovered…
Content type
Date Posted
05/06/2019