Fix photogrammetry bridges so that they are not "solid" underneath

[FlyerDreamerNJ]

@Mechy8444

Bridges in Philadelphia are horrible. I use a couple mods that luckily fixes them.

Philly local here. I bought the marketplace add on for the Philly bridges and it’s great. Asobo fixed the Delaware Memorial in the last SU, so we know it can be done.