 A concrete patching operation will be in effect beginning at 8 tonight on the outer loop of the beltway between Camp Mead Road and 97. Crews will also be performing the same work on northbound 97 between 32 and Benfield Boulevard. Two of the three lanes will be blocked until 5 a.m. Monday, July 22nd. Drivers on northbound 97 may want to use Ritchie Highway to 100 and back to 695. Go to chart.maryland.gov for real-time information.