OAR 734-074-0051
Splash and Spray Suppressant Devices


The Chief Engineer requires combinations of vehicles operating under OAR chapter 734, division 74 when highways are wet, including those surfaces that have rain, frost, ice, sleet or snow to be equipped with devices designed to suppress water splash and spray.


The Chief Engineer is hereby granted authority to approve and require by written order the type, style, design, and installation details of splash and spray devices. These devices may consist of but are not limited to the following:


Air deflectors mounted on the vehicles;


Fender flaps behind wheels;


Side flaps over wheels; and


Water collection type fenders.


Minimum splash and spray requirements are shown on Attachment 74A, revised June 2016, and Attachment 24, revised April 2015. These forms are available from the CCD Over-Dimension Permit Unit and by reference are made a part of these rules.


The headlights of a triple trailer combination and the combination described in OAR 734-074-0010 (Vehicle Combinations Eligible for Permits) (1)(h) must be illuminated any time windshield wipers are used.

Source: Rule 734-074-0051 — Splash and Spray Suppressant Devices, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=734-074-0051.

Last Updated

Jun. 8, 2021

Rule 734-074-0051’s source at or​.us