What is the difference between an expressway and a freeway?
Expressways are multi-lane roadways with a median to separate traffic. The posted speed limit is usually 55 to 65 mph, although it may be posted lower in/near urban areas. They have some at-grade intersections with public roads and driveways, allowing vehicles to get directly on/off/across the main highway. Expressways may also include interchanges and grade separations (side roads that go under or over the main road but do not access it directly). Freeways also have two or more lanes in each direction separated by a median and a 55 to 65 mph posted speed limit. Unlike expressways, freeways have no at-grade accesses of any kind. All crossroads are separated by grade (they go over or under the freeway). They provide access on/off the highway only at interchanges.
