Doomed to failure
You know why this is doomed to failure, because they have not automated train driving.
If you think about the problem of automating a train should be a lot simpler
1. You have a sodding great big hint with the tracks for the automation to work with
2. You generally(?) are going in one direction (i.e. where the tracks take you)
Until they have automated trains there is little hope for trucks and cars