So, didn't get to adding teleports at the Welcome sim (you can see Master builder taking time out there) but I rebuilt both bridges and the roads and rails leading to and over them. Much more satisfied with the revision. There's even an access bridge from the road bridge to the rail one, with safety alcoves either side. If you don't have something like that, when a train comes your workers either get run over, jump off the bridge, or run to either end. This halves the distance. Of course in real life they might have explosive caps on the side they're expecting a train, which explode when ran over.

