I'm marking this as "can't fix" as it's due to the game's limit of 255 tiles and interactions between transport drones and other mods that I can't control. The TLDR is that if you have a modpack with too many kinds of tiles (more than 255), then something is marking the "extras" as landfill. In this case, one of the "extras" is an asphalt road tile, so in effect this marks landfill as road. You can't build on roads, so now you can't build on landfill, and trucks can drive on landfill.
All you can try is looking at the mods you have which install tiles, and seeing if they have settings to reduce the number of tiles they use. Dectorio is one candidate, and asphalt roads can be set to not install some of the colored road tilesets.