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An Interstate Highway under construction (I-196), with both directions of traffic moved to one side of the roadway
An Interstate Highway under construction (I-196), with both directions of traffic moved to one side of the roadway
I-94 in Michigan, showing examples of non-interchange overpass signage in median, upcoming exit signage on right shoulder, a 1950s overpass with heigh
I-94 in Michigan, showing examples of non-interchange overpass signage in median, upcoming exit signage on right shoulder, a 1950s overpass with height restriction signage, newly installed cable median barrier, and parallel grooved pavement with shoulder rumble strips
An Interstate Highway bridge with an asphalt overlay
An Interstate Highway bridge with an asphalt overlay
The Bobby Hopper Tunnel on I-49 in Arkansas was built with a 25 ft (7.6 m) height total clearance, leaving plenty of room for lighting and signs hangi
The Bobby Hopper Tunnel on I-49 in Arkansas was built with a 25 ft (7.6 m) height total clearance, leaving plenty of room for lighting and signs hanging from the ceiling and still exceeding the 16 ft (4.9 m) minimum for rural highways. Side clearances were reduced from the recommended 44.0 ft (13.4 m) to 38.0 ft (11.6 m) due to cost concerns.
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I‑55 under construction in Mississippi in May 1972
I‑55 under construction in Mississippi in May 1972
Commemorative sign introduced in 1993. The system was established during Dwight D. Eisenhower's presidency, and the five stars commemorate his rank as
Commemorative sign introduced in 1993. The system was established during Dwight D. Eisenhower's presidency, and the five stars commemorate his rank as General of the Army during World War II.
The fervor of urban renewal led to the routing of Interstate 81 through the middle of Syracuse's 15th Ward in the 1960s. The viaduct is now slated for
The fervor of urban renewal led to the routing of Interstate 81 through the middle of Syracuse's 15th Ward in the 1960s. The viaduct is now slated for demolition.
I-95 in Columbia, Maryland, built to modern standards.
I-95 in Columbia, Maryland, built to modern standards.