A van driver escaped serious injury when his car careered off a road, crashed into a bridge and slid into the River Tamar.
Police closed the Newbridge crossing at Gunnislake, South East Cornwall, after the accident happened at around 9am this morning.
A force spokesman said the driver had suffered a suspected broken arm and had been taken to Derriford Hospital in Plymouth for treatment.
The bridge remains closed awaiting a structural inspection to ensure it is safe. Diversions have been set up.