A usually small and narrow street or alley, especially one in inferior or poorer parts of a city, away from the centre.
A secret, clandestine or illegal scene.
A gate or bar set across a road to stop carriages, animals, and sometimes people, until a toll is paid,
A trajectory on a finite time interval that satisfies an optimality criterion which is associated with a cost function.
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; a turnstile.
A beam filled with spikes to obstruct passage; a cheval de frise.
A toll road, especially a toll expressway.
A winding stairway.
To form (a road, etc.) in the manner of a turnpike road, or into a rounded form, as the path of a road.