a highway especially planned for high-speed traffic, usually having few if any intersections, limited points of access or exit, and a divider between lanes for traffic moving in opposite directions.

noun

freeway , interstate , parkway , superhighway , thruway , turnpikenotes:a highway is a main road; an expressway is a multilane highway; freeway , turnpike are types of expressways , avenue , boulevard , drive , highway , path , road , roadway , route , street , thoroughfare , turnpike