Playing the lynx server, I have realised that in pak128 it is not possible to build elevated ways across other players stations, but it is possible to build bridges over them. This means you can cross them orthogonally, but not diagonally (i.e. at 90 degrees but not at 45 degrees). Which is a bit of a pain and doesn't seem logical?
Also, very similar, it is possible to build bridges across another player's bridges at a higher level, but not elevated ways. So bridges can cross each other at 90 degrees, but not at 45 degrees.