I don't want to pour too much cold water on this idea but, from Google Earth, it looks like the roadway on the uphill side is not much more than 6 meters wide. That wouldn't be enough for two buses to pass. I think it's clear from the Google Earth view that there are two separate bridges with a gap between them, so it's not just a question of rearranging the island. The rest of the road is wider than this and although parked cars narrow it there are now frequent gaps between the cars (as a result of yellow lines) which enable vehicles to pass. I'd think the uphill bridge is too long to rely on vehicles giving way before they enter the restriction.

Reducing the downhill bridge to a single lane would allow the footway to be widened but that's not likely to happen soon after the fairly recent works to put in the protective kerbs. BTW, I believe the kerbs are there to prevent vehicles ending up on the railway track rather than to discourage pedestrians!

Presumably the bridge on the station side was the original one and the other bridge was added more recently to get rid of a bottleneck. Anybody know when? I'd guess '60's since a pedestrian subway, now filled in, was incorporated, and such things were popular back then.