Cantel has been manufacturing oversize load lamp bars for at least 25 years. The design has changed a lot over the years with many upgrades. Adaptors allow the lamp bar to fit both gutter and gutterless type roof styles as well as easily adapt to most pickup headache racks. The Cantel oversize load lamp bar fits most all regulations we know of. Some states do have a few different rules but we hope US DOT will standardize this someday. In addition Cantel has three types of 7 foot oversize load signs for the hauling truck and two types of 7 foot banner styles. For those that want to have a custom built pilot car lamp bar made, the 5 foot double sided reflective signs and of course the correct warning lights are available separately.