TRAFFIC OPERATIONS

Chapter 130 - SIGNING MANUAL (§ 761-130.1)
Chapter 131 - SIGNING ON PRIMARY HIGHWAYS (§§ 761-131.1 — 761-131.15)
Chapter 132 - IOWA BYWAYS PROGRAM (§§ 761-132.1 — 761-132.7)
Chapter 133 - Reserved
Chapter 134 - Reserved
Chapter 135 - WARNING LIGHTS ON VEHICLES OR EQUIPMENT NOT OWNED AND OPERATED BY THE DEPARTMENT WHEN USED IN ROAD WORK ZONES (§ 761-135.1)
Chapter 136 - LIGHTING (§§ 761-136.1 — 761-136.6)
Chapter 137 - Reserved
Chapter 138 - Reserved
Chapter 139 - Reserved
Chapter 140 - TRAFFIC SIGNALS AND BEACONS ON PRIMARY ROADS (§ 761-140.1)
Chapter 141 - Reserved
Chapter 142 - SPEED ZONING ON PRIMARY HIGHWAYS (§ 761-142.1)
Chapter 143 - TRAFFIC SIGNAL SYNCHRONIZATION (§§ 761-143.1 — 761-143.5)
Chapter 144 - [Rescinded] (§§ 761-144.1 — 761-144.9)
Chapter 145 - Reserved
Chapter 146 - Reserved
Chapter 148 - Reserved
Chapter 149 - Reserved