A bypass is a road or highway that avoids or "bypasses" a built-up area, town, or village, to let through traffic flow without interference from local traffic, to reduce congestion in the built-up area, and to improve road safety. A bypass specifically designated for trucks may be called a truck route.
In the picture, the bypass section called Paasikiven–Kekkosentie of the Highway 12 bypasses the city center of Tampere in Pirkanmaa, Finland. Highway 12 was moved between Santalahti and Naistenlahti to the Tampere Tunnel in 2016.
The Newbury bypass near Donnington
Old by-pass sign on Maui for State Route 30 thru surface streets
Overhead sign along Interstate 95 displaying Interstate 295 as a bypass route for Richmond, Virginia
The Kwun Tong Bypass is an elevated expressway between Lam Tin and Kowloon Bay in Kwun Tong District, Kowloon East, Hong Kong, with three lanes in each direction and a posted speed limit of 70–80 kilometres per hour (43–50 mph). It is part of Route 2 and has links to Route 5 and Route 7. It bypasses the industrial township of Kwun Tong and passes next to the boundary of the Kai Tak Airport.
Three lanes each way near Kwun Tong
Kwun Tong Bypass near Ngau Tau Kok, as seen from MegaBox in August 2017
Junction between Route 5 and Kwun Tong Bypass near Kowloon Bay in December 2006
Commemorative plaque for the opening of Kwun Tong Bypass between Wai Yip Street and Richland Gardens in September 2017