Location Name I-64 St. Louis State Illinois Country United States Geo Type Road Latitude 38.63 Longitude -90.34
Speed photo-radar enforcement decreased average car speeds in work zones up to 7.9 mi/hr in median lanes and 7.7 mi/hr in shoulder lanes at highway work zones, being equally as effective as the presence of police patrols with emergency lights off. Traffic data extracted from video recordings showed photo-radar enforcement reduced numbers of speeding cars and trucks at work zones. Speeding cars decreased 40 to 51 percent in median lanes and 7… Content type Benefit Date Posted 10/02/2013 Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17) Geolocation links Illinois, United States | Chicago, Illinois, United States