Spur route

A bypass or beltway is not considered a spur route as it typically reconnects with another or the same major road.

For example, Srinagar, the capital of the state of Jammu and Kashmir, is served by the spur route NH 1A.

Some spurs are toll-free motorways (type-A), but most are type-B or type-C roads.

Conversely, some State Highways could themselves be considered spurs, notably SH 78, New Zealand's shortest state highway, which links SH 1 in Timaru city center with the Port of Timaru.

After Ploiești, DN1A goes to Vălenii de Munte, Cheia, and then DN1A goes directly onto the Brașov.

In the UK, a spur route carries the same definition, but the numbering rules differ.

In the US, many Interstate Highways have spur routes when they enter a large metropolitan area.

Spur Interstate routes have three-digit numbers with an odd first digit.

A subsidiary route either passing through a city or bypassing it and then reconnecting to a major highway would receive an even first digit, and be considered a loop rather than a spur.

Diagrams showing how a spur connects to a third city, and numbering scheme
The Aomori Expressway (E4A) spur splits from the Tōhoku Expressway (E4)