Adds a simple Auto carrier train car, capable of carrying multiple vehicles, including tanks and cars. Simply drive it into the carrier, and release it later with the Y key. Each carrier can carry up to 5 vehicles, which will be released in the reverse order they were added. Fuel, Ammo, and any items in the trunk will be preserved, so you can just get straight to attacking the biters.
There are a few vehicles that can't be carried - obviously rolling stock can't be carried, but spider-trons are also too large to be carried. In principle, modded vehicles should work, but I haven't tested. Be warned that you might lose items from the vehicle's inventory depending on how the modded vehicle is implemented. If you find any such case, feel free to reach out, and I'll take a look at updating the mod to work.