- Loop route
A loop route is a
highway or other majorroad that extends out from a typically longer, more important parents road to enter and (usually) circle a largecity . A loop can function as a bypass for through traffic and also to service outlyingsuburb s.Loops are prominent features in many large cities in the
United States . A three-digit interstate that is a loop is usually designated by an even-digit before the number of its parent interstate. Many cites in the United States have a two-loop design where there is an outer loop, an inner loop, and interstates coming in to the city and going through the loops.Loops are less common in the
United Kingdom ; there is only one loopmotorway , the M621.See also
*
Spur route
*List of Interstates
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