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)
U.S. Route 1/9
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U.S. Route 1/9 is the 31.0-mile-long concurrency of US 1 and US 9 from their junction in Woodbridge in Middlesex County, New Jersey, north to New York City. The route is a multilane road with some fre
Concurrency (road)
…designation was removed from I-69. Some consolidation schemes involve the use of incorporating two single-digit numbers onto one marker, as along the US 1/9 concurrency in northern New Jersey. In the mid-20th century, California had numerous concurrencies, but the California Legislature removed most of them…
View north along US 1/9 at Route 35 in Woodbridge Township
View north along US 1/9 (Spring Street) at Route 81 in Elizabeth
US 1/9 northbound at the beginning of US 1/9 Truck in Newark, with sign noting "No Trucks" on the approach to the Pulaski Skyway
US 1/9 northbound in North Bergen