Lidar of the terrain is free to download from the USGS. That’s stupidly easy to make into 3d models.

Then you just need to model the structures on the route. but that’s mostly empty. You could do street-level photogrammetry by simply doing the drive with a few cameras on top of the car with GPS triggers, or even some 360 cameras.

Plug it all into Reality Capture, and you’ve got a stew going.