Four-lane and Freeway

Four-lane adjective - Having two lanes for traffic in each direction.

Freeway and four-lane are semantically related. in highway topic. In some cases you can use "Freeway" instead a noun phrase "Four-lane", when it comes to topics like capacious road.

Freeway noun - A passage cleared for public vehicular travel.

Four-lane and freeway are semantically related. You can use "Four-lane" instead a noun "Freeway".