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Sixty-six percent of drivers changed their route following information provided by Iowa 511 system.
Survey Methodology:An online survey questionnaire was delivered to current Iowa 511 users and Iowa DOT employees. Survey questions addressed the sources for obtaining information on road construction…
Content type
Date Posted
03/29/2016
Taxonomy (ARC-IT)
Traffic Signal Control (TM03),
Connected Vehicle Traffic Signal System (TM04),
Traffic Information Dissemination (TM06)
Geolocation links
Sequential Dynamic Curve Warning System reduces the number of vehicles exceeding the speed limit by 10 mph or more by 27.8 percent
Methodology12 treatment sites and 24 control sites in Iowa, Missouri, Texas, Washington, and Wisconsin were studied. The system was installed at each site during the summer of 2012. The installed…
Content type
Date Posted
02/09/2016
Geolocation links
Dynamic Speed Feedback Signs on Curves cuts number of single-vehicle crashes nearly in half.
Methodology
The 7 participating states (Arizona, Florida, Iowa, Ohio, Oregon, Texas, and Washington) found 51 viable sites with an existing speeding problem. Signs were installed at 22 treatment…
Content type
Date Posted
12/07/2015
Taxonomy (ARC-IT)
Autonomous Vehicle Safety Systems (VS01)
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
Taxonomy (ARC-IT)
Infrastructure Monitoring (MC09),
Weather Data Collection (WX01),
Spot Weather Impact Warning (WX03)
Geolocation links
INTELLIGENT TRANSPORTATION SYSTEMS JOINT PROGRAM OFFICE
1200 New Jersey Avenue, SE
Washington, DC 20590
