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Volume-1 . Technical Report Documentation Page 1. Report No. 2. Report Date DDOT- 01/15/2014. 3. Title and Subtitle 4. Contract or Grant No. Speed Limit and safety Nexus Studies for Automated Speed DCKA-2013-T-0115. Enforcement for the District of Columbia PO484308. 5. Author(s). Mr. James Cheeks, FITE. Mr. Rahul Jain Ms. Greer Gillis, Mr. Don Maclean, Dr. Stephen Arhin, , PTOE. Ms. Elizabeth Andrew 6. Performing Organization Name and Address 7. Type of Report and Period Parsons Brinckerhoff, Covered. 1401 K Street, NW, Suite 701 Highway safety , 2013. Washington, DC 20005. 8. Sponsoring Agency Name and Address District Department of Transportation 55 M Street, SE. Washington, DC 20003. 9. Supplementary Notes 10. Abstract The District Department of Transportation (DDOT) conducted a study to establish a nexus between traffic safety and placement of automated speed enforcement devices (speed cameras) in the District of Columbia. As part of this study, Parsons Brinckerhoff and its team members conducted speed and volume studies, performed field assessments, reviewed speed data and analyzed crash data at the 295 speed camera locations in the District of Columbia.

data and analyzed crash data at the 295 speed camera locations in the District of Columbia. The purpose of this activity was to use real-world data to determine the safety nexus at each of the enforcement locations.

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