As soon as possible after getting paint from road stripes on your vehicle - wash the vehicle at a pressure car wash. This will loosen and remove most of the paint unless it has dried for more than a day. If the pressure car wash does not remove the traffic paint, allow the water to dry off the vehicle.
Then spray the paint residue with WD-40 and allow the WD-40 to stay on the area for 1 to 3 hours and rewash the Vehicle with a pressure car washer. The WD-40 will soften the traffic paint without hurting the vehicle finish. If there is a heavy concentration, repeat the procedure.
Vaseline Petroleum Jelly
For heavy accumulations or traffic paint that has dried for several days, apply a liberal coating of Vaseline petroleum jelly to the dried traffic paint and allow the Vaseline to stay on the area overnight. The next day, take the vehicle to a pressure car wash and wash it. This should remove most of the traffic paint. If not, repeat the procedure.