BAR HARBOR, Maine (AP) It’s going to take more than a reservation to drive to the top of Acadia National Park’s Cadillac Mountain this summer.

The Bangor Daily News reports that a proposal would require motorists to pony up $6 per vehicle.

The reservation system aimed at reducing vehicle congestion requires reservation holders to drive to the summit at specified times. The park has not previously required reservations to drive up the Cadillac summit road, nor has it charged private motorists a fee to do so.