Dictionary.com
Thesaurus.com

expressway vs. highway

[ik-spres-wey] / ɪkˈsprɛsˌweɪ /

noun

  1. 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.

[hahy-wey] / ˈhaɪˌweɪ /

noun

  1. a main road, especially one between towns or cities.

    the highway between Los Angeles and Seattle.

    Synonyms:
    interstate, thruway, freeway, expressway
  2. any public road or waterway.

  3. any main or ordinary route, track, or course.