A business loop freeway (or freeway loop) is a freeway that is designated as a business route of an Interstate highway with green and white shields. Business Loop Freeways are created as a result of a newer freeway route being constructed parallel to the original Interstate, and the Interstate designation is transferred to the new alignment. Normally, the older route is not up to Interstate standards, so it is not considered for a three-digit interstate designation. Examples include Business Loop I-80 in Sacramento, California; Business Loop I-40 in Winston-Salem, North Carolina; and Business Loop I-85 in Spartanburg, South Carolina.