Norfolk Southern–Gregson Street Overpass

The Norfolk Southern–Gregson Street Overpass is a railroad bridge in Durham, North Carolina, United States, which was designed in the 1920s and built in 1940. The 81-year-old bridge allows passenger and freight trains to cross over South Gregson Street in downtown Durham. The bridge was built with a clearance for vehicles of 11 feet 8 inches . This was a standard height at the time it opened. The standard clearance, since 1973, has a minimum height of 14 feet , which is 2 feet 4 inches higher than the bridge as built.
Despite numerous warning signs about the low clearance, a large number of trucks, buses, and RVs have collided with the overpass at high speed, tearing off roof fixtures, and at times shearing off the trucks' roofs, earning the bridge the nicknames the "Can Opener" and the "Gregson Street Guillotine". In October 2019, the North Carolina Railroad Company, which owns the bridge and tracks, raised the bridge by 8 inches to 12 feet 4 inches to reduce collisions .

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