turnpike

Short definition from Wiktionary

Noun

1. 1
   A frame consisting of two bars crossing each other at right angles and turning on a post or pin, to hinder the passage of animals, but admitting a person to pass between the arms.
2. 2
   A gate or bar set across a road to stop carriages, animals, and sometimes people, until a toll is paid.
3. 3
   A winding stairway.
4. 4
   A beam filled with spikes to obstruct passage; a cheval de frise.
5. 5
   A toll road, especially a toll expressway.
6. 6
   A trajectory on a finite time interval that satisfies an optimality criterion which is associated with a cost function.

Verb

1. 1
   To form (a road, etc.) in the manner of a turnpike road, or into a rounded form, as the path of a road.