[smsm42]

If we had usage-paid highways (which we couldn't have earlier due to missing technology but now such things start to pop up), I can imagine some remotely-located mega-store could advertise as "come to us and we'll pay your road toll - both directions!".

[Argorak]

Usage-paid highways have been standard in some countries for ages - they just use toll bridges at every entrance and exit and deduce your price from entrance and exit position.

[astrodust]

Subsidized parking is a similar sort of thing.