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)
Interstate 94 in Michigan
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Interstate 94 is a part of the Interstate Highway System that runs from Billings, Montana, to the Lower Peninsula of the US state of Michigan. In Michigan, it is a state trunkline highway that enters
I-94 at Park Road near Coloma
US 23 interchange in Pittsfield Township
I-94 as seen from the air near Detroit Metropolitan Airport
I-94 eastbound approaching exit 271 in Port Huron