This Way to the Forums! Give it a try! It Works! (sort of...)
<googlemap lat="51.427765" lon="-2.634358"> 51.427444, -2.634348, Colliters Path </googlemap>
I have to confess to not having a clue as to the true name of this path and bridge. Colliters Brook passes under the railway just a few feet away and so I've given it a similar name until the real one can be discovered.
The footpath goes under the railway next to Colliters Brook. Trains travelling into Bristol go from right to left in this pic.