Side Marker Lights Required for Trailer Wider Than 80 Inches and Longer Than 30 Feet

Question:

I read your answer on trailer more than 80 inches wide...got the tail lights. Excellent answer quoting D.O.T. specs.....new question. How many side markers on the side of trailer need for D.O.T. certification when the trailer is 37 feet long?

asked by: Colby C

Helpful Expert Reply:

If your trailer is more than 80" wide and 37' long then you need 2 rear side marker lights, 2 rear side reflectors, 2 front side marker lights, 2 front side reflectors, 2 intermediate side marker lights and reflectors, as well as 2 front and 2 rear clearance lights.

I have attached a helpful article that explains how many lights you need for different trailer variations and I clipped the parts specific for your trailer for you to check out. We have an abundance of lights and wiring as well as reflectors here at etrailer and I have attached links to all of these for you to filter through as well. If you need help finding something specific please don't hesitate to reach back out.

expert reply by: Jon G