Maryland Department of Transportation State Highway Administration

***TRAFFIC ALERT*** STATE HIGHWAY ADMINISTRATION TO REPAIR LIGHTING ON THE MD 4 / GOV. THOMAS JOHNSON BRIDGE IN SOUTHERN MARYLAND

MD 4 sign

MD 4 sign

​Maintenance Work Scheduled for Thursday Night, December 4th 

(December 2, 2025) – The Maryland Department of Transportation State Highway Administration will repair aerial navigational lighting on the MD 4 Bridge over the Patuxent River (Governor Thomas Johnson Bridge) at the Calvert/St. Mary’s County line starting 9 p.m. Thursday night, December 4. The overnight work will continue until 5 a.m. the following morning, weather permitting.

During the maintenance work, crews will close one lane and alternate traffic in the open lane using a flagging operation. Portable variable message signs will be placed along area state roads to make travelers aware of the lane closure. Overnight travelers should plan extra travel time to cross the bridge.

Drivers are asked to stay alert, stay focused, look for reduced speed limits as well as driving pattern changes, and slow down in work zones​. Customers may contact the District 5 Office at 410-841-1000 or toll-free at 1-800-331-5603 for additional information; they may also dial  #77 on their mobile devices for roadside assistance.​

For a list of all major State Highway Administration projects, go to Project Portal, or visit the homepage at roa​ds.maryland.​gov. For a look at real-time traffic conditions, go to chart.mary​land.gov.


###