Etymology: Middle English turnepike revolving frame bearing spikes and serving as a barrier, from turnen to turn + pike
1 : TOLLGATE
2 a (1) : a road (as an expressway) for the use of which tolls are collected (2) : a road formerly maintained as a turnpike b : a main road; especially : a paved highway with a rounded surface.
http://www.m-w.com/cgi-bin/dictionary?book=Dic tionary&va=turnpike
http://www.etymonline.com/index.php?term=turnp ike
A toll road, also known as a tollway, turnpike, pike or tollpike, is a road for which a driver pays a toll (that is, a fee) for use. Similarly there are toll bridges and toll tunnels. Non-toll roads are financed using other sources of revenue, most typically gasoline tax or general tax funds. Tolls have been placed on roads at various times in history, often to generate funds for repayment of toll revenue bonds used to finance constructions and/or operation. The building or facility where a toll is collected may be called a toll booth, toll plaza, or toll gate.