Science Fair Project Encyclopedia
Business Spurs are marked with a green Interstate shield. The signs are marked with the word "Business" in the top quarter of the shield, where "Interstate" would go on a normal Interstate, and the route number of its parent, with the word "Spur" in small white letters above the number, in the bottom three-quarters of the shield.
Unlike 3-digit Interstate spurs, Business Spur Interstates can be repeated in the same state. However, they only meet their parent at one end, and stop at the downtown district of a city.
A Business Spur can be routed onto a surface street.
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