At 11:25hrs Bucks County Radio Dispatched Engine 27 NB & Engine 58 SB on the 309 bypass for a vehicle on fire in the area of mile marker 25.0. Chief 27 Arrived on location with one vehicle on the NB shoulder with the engine compartment well off. Engine 27-1 arrived on location crews pulled an 1 3/4" handline to extinguish the fire. Engine 58 Arrived on location, staged at behind 27-1 providing protection while supplying Engine 27-1 with water if needed. Engine 27 also responded with a full crew and staged to the rear of Engine 58.