Iowa Department of Public Safety Iowa State Patrol Division
Search WWW Search DPS Website

IOWA LAW - 321.323A
Approaching certain stationary vehicles
(effective July 1, 2002)


photo of vehicle struck while parked along road
This State Patrol vehile was struck while parked
along the Interstate with lights flashing.

This catch phrase is being used in reference to the new law regarding what you should do when approaching emergency vehicles displaying flashing lights.

The law is as follows:

  1. The operator of a motor vehicle approaching a stationary authorized vehicle that is displaying flashing yellow, amber, white, red, or red and blue lights shall proceed in one of the following manners, absent any other direction by a peace officer.

    a. Make a lane change into a lane not adjacent to the authorized emergency vehicle, if possible in the existing safety and traffic conditions.

    b. If a lane change under paragraph "a" would be impossible, prohibited by law, or unsafe; reduce the speed of the motor vehicle to a reasonable and proper speed for the existing road and traffic conditions, which speed shall be less than the posted speed limit, and be prepared to stop.

2. The law also applies to operators of a motor vehicle approaching a stationary towing or recovery vehicle, or a stationary highway maintenance vehicle, that is displaying flashing yellow, amber or red lights.


FINE - For a violation under section 321.323A or 321.324, the scheduled fine is fifty dollars ($50)

The Iowa State Patrol appreciates your assistance and compliance with this new law to ensure the safety of the public and Iowa law enforcement.

Click here to sign up for email notifications