It's a much easier challenge when every moving vehicle in the airport environment is issued a relatively exact clearance.

The ATC clearance gives each vehicle a movement contract.

It would be great if avionics actually took those into account. Avionics should help pilots ensure their vehicles don't break the contract and should also alert immediately if other vehicles have, or their velocity vector is such that they will violate the contract. IE braking rate is insufficient to stop before the hold short line. ATC computers should ensure no conflicting clearances are issued.

None of that happens right now.