Photo Radar Locations To maximize the program's flexibility and impact, the Metropolitan Police Department is using both mobile photo radar units and fixed-location cameras to monitor aggressive speeding. Photo radar enforcement zones are selected by the MPDC based on recents incidents of speeding-related fatalities and crashes, proximity to school zones and other places where children or other vulnerable populations may be present, and known sites of chronic speeding. The deployment of the mobile photo radar units is at the sole discretion of MPDC traffic safety experts. The MPDC has identified approximately six dozen enforcement zones, located throughout the District of Columbia, at which mobile photo radar units may be deployed. These include a combination of residential streets, major arteries and highways. The MPDC generally deploys mobile photo radar cameras at only a select number of locations at any one time. Not all of the listed locations necessarily have mobile photo radar enforcement at the current time. Click here for a list of photo radar enforcement zones.