superhighway — a highway designed for travel at high speeds, having more than one lane for each direction of traffic, a safety strip dividing the two directions, and cloverleaves to route the traffic on and off the highway. Compare expressway.
Four-or-more syllable rhymes
divided highway — a superhighway with a broad median strip, designed to prevent collisions, headlight glare, etc., between vehicles moving in opposite directions, and usually having limited or cloverleaf access.
