Residents living near a bridge that crosses the main Weymouth to Waterloo railway line in Eastleigh say they fear it is unsafe after being repeatedly hit by lorries.
The Campbell Road bridge links the town centre to a large industrial estate and 150 houses.
People living nearby say the strikes have caused gaps and breaches in the structure and as soon as it is repaired it gets hit again.
Eileen Marks said that residents were "waiting for a disaster".
"We fear there is going to be a tragic accident, big lorries are continually hitting the corner of that bridge."
Network Rail said it carried out work in November 2016 to install seven concrete panels to protect the bridge from damage, and is working to replace three of those panels.
It added that replacing the bridge is something it would potentially consider over the next five years.