A.R.S. § 28-703.01: End of speed zone; signs required

The agency or authority establishing a speed zone under section 28-702 or 28-703 is responsible for erecting:

1. At the beginning of each zone a sign designating the maximum allowable speed within the zone.

2. At the end of each zone a sign bearing either the legend "resume speed" or setting forth the new maximum speed limit.