A parking designator

I know there are already other suggestions for parking (already read them), but I wanted to post my suggestion since it's a little different.
2 parking designations set to a lower, hidden priority for idle trucks such to go to when there aren't that many jobs currently. You could also link them to any building you can assign vehicles to to have them park there instead of circling the building/tower. Unassigned vehicles would go to the nearest unlinked designator.
It would use the texture of the truck area for fuel stations (with a P added) and could be tiled over. Would either be free or cost 4-6 concrete slabs. The 2 designators would be: one for mega vehicles with dimensions of 1x6 (length of mega vehicles), and one for all other vehicles with dimensions of 1x4 (length of most normal vehicles). Having the designators only 1 tile wide lets you customize more, but you still have to respect the vehicle pathing restrictions for them to available for parking.

In addition (although not as necessary) you could have the vehicles snap straight (maybe with slight angle deviations for a little randomness) to the spot on arrival, or force them to come in straighter for parking.