superroad
noun
su·per·road
| \ ˌsü-pər-ˈrōd
\
\
plural superroads
Definition of superroad
: a very large road
… surveys were started in the 1930s in Indiana for a superroad known as the Tri-State Highway, a tax-financed facility with design standards on a par with toll roads.— Albert J. Wedeking
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