Line striping is painting the parking stalls, arrows, accessible stall symbols, fire lanes and curb markings on a paved surface.
It's the last step on nearly every lot, whether the lot was paved, overlaid or sealcoated. New asphalt has to cure and sealer has to be completely dry before paint goes down, so follow the paint maker's wait time. On new pavement, plan on a second coat. On a new layout the crew lays the stalls out from the plan and snaps lines first. On a restripe they follow the old lines.
Accessible stalls follow the 2010 ADA Standards. A standard accessible stall is at least 8 feet wide with a 5-foot access aisle. At least one of every six accessible stalls has to be van-accessible, with an 8-foot aisle or an 11-foot stall next to a 5-foot aisle. Your state or city can require more.
Striping is priced by the count: stalls, symbols, arrows, stop bars, plus linear feet of fire lane or painted curb, with a minimum charge for small lots. When you figure paint, remember stalls share lines. A row of 20 stalls is 21 lines, which at 18 feet each is about 380 linear feet, not 720.
Striping is often a separate crew or a sub, but it belongs on the same proposal and invoice as the paving or sealcoat it follows.