D.C. police are delaying the issuance of tickets from a new set of traffic enforcement cameras.

Officials had expected to have the cameras in use, issuing tickets Monday, but they want to make sure the locations have been issuing warnings for 30 days first. The cameras were installed in late November.

The cameras are located at intersections with known speeding problems. They are expected to track drivers who speed and violate other traffic infractions, such as rolling through stop signs, crosswalks and intersections.

The cameras are also expected to track vehicles that “block the box” at intersections and drivers that fail to stop in residential neighborhoods, according to police.

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