MD 4 sign
Flagging Operation will Guide Drivers Through the Work Zone
(April 8, 2026) - The Maryland Department of Transportation State Highway Administration will perform routine maintenance on two State-maintained bridges in southern Maryland this month.
The bridges are:
- Sunday morning April 12: MD 4 (Governor Thomas Johnson Bridge) bridge at the Calvert County/St. Mary’s County line;
- Sunday morning April 26: MD 231 (Hallowing Point Road) bridge at the Calvert County/Charles County line.
In each instance, crews will close one lane at 6 a.m. and direct drivers using a flagging operation. The lane will open to traffic no later than 2 p.m. each afternoon, weather permitting. Drivers should plan extra driving time.
Maintenance crews will clean the drainage systems and the bridge decks (driving surface). Drivers will be guided using a flagging operation. Portable variable message signs will provide advanced notification of the work. Customers may contact the District 5 Office at 410-841-1000 or 1-800-331-5603 with any questions.
The State Highway Administration is Serious About Safety. Pedestrians and motorists are urged to remain alert and avoid distractions when traveling through the work zone. Motorists should obey all posted speed limits. Motorists can dial #77 on their mobile devices for roadside assistance.
For a list of all major State Highway Administration projects, news and travel information, visit roads.maryland.gov.