Good idea! I noticed that most teams starting on the loading side just moved along the wall to cross the bridge. Going with that logic maybe this can work:
Loading Zone Start: Park against wall (within square tile touching the wall)
Building Zone Start: Park near neutral bridge (within square tile touching the neutral bridge)
Another good idea I heard mentioned – alliances robots should move in a clockwise motion during both tele-op and autonomous modes. As autonomous modes and tele-op strategies get more complex, this could help be a standard rule to avoid collisions. When retrieving stones from the build zone, go under the neutral bridge, then return clockwise via the skybridge (to get the point).