On an older, well developed world you might see the contragrav equivalent of a
Hyperloop network for major shipping. Pulling the air out of the way would let the cars move very quickly and they could be elevated with contragrav to have no rolling friction. On un- or under-developed worlds you would probably see various flavors of air rafts doing most of the trucking. It would probably take a large increase in shipping to make it economically viable to install the contragrav hyperloop instead of just relying on air raft "trucking".