If Prince George’s County’s new speed cameras catch you speeding, don’t expect to get off with just a warning.

The 30-day grace period for the newly installed cameras is officially over, and starting Wednesday the county will issue citations — complete with a $40 fine — to drivers traveling 12 miles per hour or more above the posted speed limit.

The cameras, which debuted Aug. 22, operate from 6 a.m. to 8 p.m. Monday through Friday within a half-mile of two schools in Fort Washington.

The schools, Isaac J. Gourdine Middle School and Tayac Elementary School, are located in the 8600 and 8700 blocks of Allentown Road.

For more information, visit the Prince George’s County Police Web site.