Census definition: an official count or survey of a population, typically recording various details of individuals population estimates increase from the 1981 census
Turnpike definition: US an expressway, especially one on which a toll is charged.
a road on which a toll was collected at a toll gate.
a spiked barrier fixed in or across a road or passage as a defense against sudden attack. To reach our destination we will have to turn onto this turnpike.