Forbidden Drive was a turnpike with three toll booths when it was completed in 1853. It became Wissahickon Drive in 1874 when the Fairmount Park Commission bought the surrounding land. Auto owners wanted to use it when they came along, but in 1920 the Philadelphia Riders and Drivers (of carriages) won and cars became forbidden on the drive. This information is from an article by Peter Lapham in Friends of the Wissahickon, Summer 2012, Vol. 21, #2.