I visited the bridge just after it was re-constructed in 2014, and, much as I appreciated the historic charm, etc I found it a bit dangerous inside the bridge, it was dark, the timber floor was all the same, but the elevated sidewalk had a vertical edge, with no markers or bevel, almost impossible to see it.
One person tripped on this edge and fell down, and a few others also tripped on it but managed to stay on their feet, many others luckily didn't walk near it.
There should be a marker stripe on this dangerous edge and/or a warning sign for pedestrians as to the existence of the sidewalk and where it is.
On the day I visited, the lights inside the bridge were either not switched on or they were inadequate.
It would not detract from the historic image of the bridge to at least put a bevel on the edge, rather than leave it vertical, it would be a serious situation for a person to trip on the edge whilst a vehicle is passing.