The term “lowboy” may be used to refer to a drop deck and/or Removable Goose Neck (RGN) trailer. Lowboy: A type of trailer with low clearance that can accommodate taller loads. Longer combination vehicle: A combination of truck tractor, semi-trailer, and trailer that exceeds legal length dimensions and operates on highways by permit for transporting reducible loads. The length of a loaded trailer must include any overhangs of load. Length: Trailer length is measured from the front of the cargo-carrying unit to its rear, exclusive of all overhangs from safety or energy efficiency devices. Leapfrogging: When, on hilly or curvy terrain, the load must be stopped and traffic control measures put in place before proceeding. Height: The total vertical dimension of a vehicle above the ground surface (including any load or accessories). Gore strip: The area dividing two merging lanes. An undivided highway is one without such a barrier, where opposing lanes are divided only by a double yellow line.ĭivisible load: A load that can be divided into smaller sections that can be transported separately from each other.Įxtra-legal vehicle: Any vehicle that exceeds legal dimensions and/or weights (an Oversize Load is an extra-legal vehicle).įMCSA: Federal Motor Carrier Safety Administration.įog line: A solid white line that divides the road from the shoulder. Make sure you verify daylight hours in each state in which you will be operating.ĭeflection: The amount the tip of the high pole bends while traveling at high speed.ĭivided/undivided highway: A divided highway is one where the lanes going in opposite directions are divided by a barrier (usually either a concrete barrier or a median strip). Ĭurfew: Times of the day that an Oversize Load may not travel on particular roads.ĭaylight hours: In Washington State, these are defined as one half hour before sunrise until one half hour after sunset. P/EVOs, like roadside flaggers, need high visibility clothing that conforms to ANSI standards. This organization creates standards for a wide range of sectors in the United States. ANSI: American National Standards Institute.
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