Solomons, MD – The Maryland Department of Transportation’s State Highway Administration (SHA) will perform its biennial inspection of the MD 4 (Governor Thomas Johnson) Bridge over the Patuxent River beginning Sunday, March 13.

Inspections are scheduled as follows, weather permitting:

  • Overnight between 9 p.m. and  5 a.m. Sunday, March 13, through  Friday, March 18
  • Overnight between 9 p.m. and  5 a.m. Sunday, March 20, through  Friday, March 25
  • Daytime between 6 a.m. and 1 p.m.  Saturday, March 19; Sunday, March 20, Saturday, April 2, and Sunday, April 3

Crews will use a flagging operation to alternate traffic. The lane closure will guide motorists through the single-lane work zone.

In addition to biennial inspections of the entire bridge structure, SHA regularly monitors the bridge deck (riding surface) and performs maintenance, repairs and upgrades as appropriate. Constructed in 1977, the Thomas Johnson Bridge carries more than 28,000 vehicles each day between Calvert County and St. Mary’s County .

Maryland now features FREE 511 traveler information! Call 511 or 1-855-GOMD511 or visit: for current travel information. Sign up to personalize travel route information through MY511 on the website. Remember to use 511 safely – Maryland law restricts hand-held mobile phone use and texting while driving.