State highway
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A state highway, state road, or state route is usually a road that is either numbered or maintained by a sub-national state or province. A road numbered by a state or province falls below numbered nat
Strada statale 163 Amalfitana in Italy, which runs along the stretch of the Amalfi Coast between the southern Italian towns of Sorrento and Amalfi.
A Canadian provincial highway double-signed with a numberless, but named, national Trans-Canada marker
Staatsstrasse 156 in Saxony
Strada statale 1 Via Aurelia in Arenzano. It is one of the most important state highways in Italy and derives from an ancient Roman consular road, the Via Aurelia.
Concurrency (road)
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In a road network, a concurrency is an instance of one physical roadway bearing two or more different route numbers. The practice is often economically and practically advantageous when multiple route
Highway shields on a two-way concurrency, where I-99 and US 220 share one roadway traveling northbound in Antis Township, Blair County, Pennsylvania
U.S. Route 1/9 concurrency signed on a shield on the Pulaski Skyway
The Queen Elizabeth Way concurrent with Highway 403 in Ontario
An extreme example in Greensboro, North Carolina, where I-40, I-85 Business, US 29, US 70, US 220, and US 421 formerly ran concurrently (2006)