Mobilization is the cost of moving crews, equipment and material to a job and setting up to start work.
On a GC's price sheet and on public work it's called mobilization. On your own proposals it pays to say it plainly: Pavr's service library calls this line Equipment transport and setup, because a property manager reading the proposal shouldn't have to ask.
For a paving crew it's the lowboy trips for the paver and rollers, the trucks, setting traffic control, and the crew hours before the first ton goes down. For a sealcoat or striping crew it's smaller but still real, which is why small lots carry a minimum charge. On commercial work it's usually the first line on the schedule of values.
Remobilization is paying that cost again when the job gets interrupted: rain, a lot still full of cars, or an owner who asks you to come back next week. Whether you get paid for it depends on what the proposal says. Put a remobilization charge in the contract and it's a change order. Leave it out and it's yours to eat.