Mod predates Spidertron and I've never used it myself, so don't really know.
But pretty sure it shouldn't have car controls (i.e. steering, velocity and momentum), and so needs some different kind of movement-lock, probably same as you'd implement for a player to endlessly run in the same direction.
Don't think there'd be any workaround, aside from just implementing it in lua or finding another mod that does it, but again, don't know much about spidertron controls myself.
Seems a bit out of scope for this mod tbh, and not sure if I'll ever get back to factorio to add it anyway, unfortunately.
