Turnpike Origin.

Greetings loyal minions. In answer to your AirMarshal's question. The term "Turnpike" came about in 15th Century. Roads connecting cities were generally blocked for defensive purposes and a gate house or a turnstile was put up to limit movement. (Gatehouses were often guarded by soliders with long Pikes as well...) Tolls were charged along the road to pay for security and improvements. These were the Turnpike Roads. Later shortened to Turnpikes.

Your Maximum Leader knew this from his extensive study of 18th Century British Highwaymen. But he did receive some help from these web sites to nail down dates. The sites are here, here, and lastly here.

Carry on.

Richard III R.I.P.