What does "roadbed" mean?

The prepared location for a road, including its foundation.

What is a synonym for "roadbed"?

Common synonyms include: alley, alleyway, arterial, arterial highway, arterial street, artery.

/ˈɹoʊdˌbɛd/ noun

noun ·Moderate ·College level

Noun

"The roadbed, much of it fringing Swansea Bay, has been given free to the local authorities."

From road + bed.