This bill amends existing law (RCW 46.44.030) to revise how overall vehicle length is measured and to set specific maximum overall length limits and exceptions for vehicles and vehicle combinations on Washington public highways. It adds definitions for “fifth-wheel travel trailer,” “kingpin,” and “stinger-steered,” and specifies that the overall length of a fifth-wheel travel trailer is measured from the centermost point of the kingpin to the rearmost point of the vehicle. The amendment establishes a general maximum overall vehicle length of 40 feet and lists exception maximums for certain vehicles and combinations: up to 46 feet for municipal transit vehicles, auto stages, private carrier buses, school buses, travel trailers, fifth-wheel travel trailers, or motor homes; up to 61 feet for articulated auto stages (excluding a bike rack up to 4 feet); up to 42 feet for auto recycling carriers manufactured before 2005; 53 feet for a semitrailer in a tractor-semitrailer combination; combined trailer length not to exceed 61 feet for a tractor with two trailers; up to 82 feet under an inventory exception (subject to weight and cargo limits); and up to 75 feet for a truck and trailer or log truck and stinger-steered pole trailer. The inventory exception requires the two trailers or semitrailers to have a combined weight of 26,000 pounds or less and to carry only inventory of a manufacturer, distributor, or dealer (no other cargo). The bill also requires vehicles transporting poles, pipe, machinery, or other structural objects for emergency public utility repair to display sufficient clearance lamps on both sides and marker lamps at the extreme ends of any projecting load during night transport. It excludes from length calculations certain devices that provide added safety, energy conservation, or are otherwise necessary and not designed or used to carry cargo, and directs the Department of Transportation to adopt rules under RCW 46.44.101 identifying those devices. Affected parties include the Department of Transportation, various vehicle operators and owners (transit, buses, trailers, trucks, log trucks, etc.), trailer manufacturers/distributors/dealers, and public utilities performing emergency repairs. The extracted material does not state an effective date or whether additional sections or provisions appear elsewhere in the bill.

If enacted, the law will make clear how overall vehicle length is measured for certain trailers and set specific maximum lengths that let a range of vehicles (buses, travel trailers and fifth‑wheel trailers, motor homes, articulated stages, semitrailers, log trucks with stinger‑steered pole trailers, and certain auto recycling carriers) operate longer than the general 40‑foot rule. That will give operators and fleet managers more predictable options for what they can legally run on Washington highways, and the clarified measurement for fifth‑wheel trailers (kingpin to rear) reduces ambiguity when buying, registering, or getting citations for those rigs. The Department of Transportation must adopt rules identifying equipment that is not counted in length, which means DOT will soon set details that affect compliance and enforcement. Public utilities doing emergency repairs will likely need to add or use more clearance and end marker lamps when moving projecting loads at night, creating a modest equipment and operational cost but reducing nighttime collision risk and potential liability. Manufacturers, distributors, and dealers can sometimes transport two trailers as dealer inventory up to a much longer combined length if they meet a 26,000‑pound weight cap and don’t carry other cargo, which could reduce trips and logistics costs for those businesses but imposes inspection/weight‑compliance responsibilities. The text provided lacks an effective date and may be only one section of the bill, so timing and any additional changes elsewhere are unclear.