With more than 25,000 state-owned bridges, Pennsylvania has the third-largest number of bridges in the nation. The average age of bridges on the state system is over 50 years old.

PennDOT is committed to maintaining and improving bridges through bridge preservation activities, including painting, deck joint repair or replacement, rigid deck overlays, etc. In the long run, preservation saves money by extending bridge service life, thus deferring the need for major rehabilitation of bridges.

PennDOT is responsible for the safety inspection of approximately 25,000 state-owned highway bridges, conducting approximately 18,000 each year. Each of these bridges must be inspected at least once every two years. Some bridges such as those with weight restrictions are inspected once a year or more frequently if a bridge is in Poor condition. PennDOT also oversees the inspection of approximately 6,500 highway bridges and culverts owned by local municipalities or other agencies.

More information on bridge safety inspections, plans and specifications, and more is on our department Bridges page.