sellect only part of a intersection

Hallo,

I am making a simulation terrain for vrforces. I want to make use of bridges in vrforces.

I have line shapes of roads and water. Is it possible to select ONLY that part of the road that crosses the water (perhaps with a buffer of 5 meters). So I end up with a selection off a road that crosses water 5 meter before and after the crossing. That will by the bridge.

I was looking in the select by location but then I end up with all the vector of the road that crosses the water.

Greetings peter