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After deployment of dilemma zone protection system, the percentage of drivers going through an intersection at speed on a yellow phase reduced from 50 percent to 43 percent at one intersection and 18 percent at another.

Findings More drivers were observed making the conservative decision to "stop" during a yellow phase, compared with the driver decisions observed in the before-deployment period. For example, the…
Content type
Benefit
Date Posted
01/04/2018
Taxonomy (ARC-IT) Traffic Signal Control (TM03), Integrated Decision Support and Demand Management (TM09)
Geolocation links
Elkton, Maryland, United States   |   Hagerstown, Maryland, United States

After deployment of a dilemma zone protection system in Maryland, the percentage of vehicles approaching rural intersection sites at excessive speeds dropped from 29 to 16 percent at one site and from 8 to 1 percent at another site.

Findings After deployment of the dilemma zone protection system, the percentage of vehicles approaching at a speed over 55 mi/h (the posted speed limit) at the intersection of US-40 and Western…
Content type
Benefit
Date Posted
01/04/2018
Taxonomy (ARC-IT) Traffic Signal Control (TM03), Integrated Decision Support and Demand Management (TM09)
Geolocation links
Elkton, Maryland, United States   |   Hagerstown, Maryland, United States

Deployment of a dilemma zone protection system reduced the maximum length of the dilemma zone by 30 percent at a rural intersection in Maryland.

Findings The maximum length of the dilemma zone was reduced by 960 to 670 feet (vehicles traveling at 75 mi/h), a 30 percent reduction, at the intersection of US 40 and Western Maryland Parkway. The…
Content type
Benefit
Date Posted
01/03/2018
Taxonomy (ARC-IT) Traffic Signal Control (TM03), Integrated Decision Support and Demand Management (TM09), V2V Basic Safety (VS02), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Elkton, Maryland, United States   |   Hagerstown, Maryland, United States
ITS Deployment Evaluation

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