How to Ship a Road Widener: Dimensions, Trailers & Permit Guide

What Is a Road Widener?

A road widener (also called a shoulder widener or paving widener) is a self-propelled machine that lays asphalt or aggregate material alongside an existing road to widen the travel surface or build up shoulders. Common manufacturers include Weiler, Carlson, and LeeBoy. Road wideners are typically used by highway contractors, county road departments, and state DOT crews. Because they are designed to straddle the edge of a road during operation, they are built wide — often 10 to 14 feet in transport configuration — which almost always triggers oversize permit requirements.

Typical Dimensions and Weight

Screed extensions, if present, must be fully retracted or removed before transport. Some models have a folding ROPS (Rollover Protection System) that should be lowered to reduce transport height. Always measure the machine in its actual transport configuration — not the operating configuration — before requesting a quote.

Trailer Selection

The wide transport profile of most road wideners rules out standard flatbed trailers for most moves. The two most common trailer options are:

• Step Deck (Drop Deck): Suitable for road wideners under 10 ft wide and under 10.5 ft tall. The lower deck height (approximately 36 inches off the ground) provides extra height clearance compared to a standard flatbed. Step decks are the most economical option when the machine fits within their capacity.
• RGN (Removable Gooseneck): The preferred trailer for most road wideners. The detachable gooseneck lowers the deck to ground level, allowing the machine to be driven directly onto the trailer without ramps. RGNs handle loads up to 150,000 lbs and accommodate widths up to 16+ feet with proper permitting. The low deck height (approximately 18–20 inches) also helps keep the overall transport height within permit limits.
• Lowboy (Double Drop): An alternative to the RGN for machines that can be loaded via ramps. Lowboys have a deck height of approximately 18 inches and handle loads up to 80,000 lbs on a standard configuration.

Permit Requirements

Because most road wideners exceed 8 ft 6 in in transport width, oversize permits are required in every state the load traverses. Width-based permit requirements vary by state:

• 8 ft 6 in – 12 ft wide: Oversize permit required in all states. Typically no escort vehicle required.
• 12 ft – 14 ft wide: Oversize permit required. One pilot car (escort vehicle) typically required in most states.
• 14 ft – 16 ft wide: Oversize permit required. Two pilot cars typically required. Some states require law enforcement escort.
• Over 16 ft wide: Super load permit may be required. Law enforcement escort typically required. Travel restricted to daylight hours in most states.

Permit processing time ranges from same-day (for standard oversize loads in most states) to 5–10 business days (for super loads requiring engineering review). Plan accordingly when scheduling your move.

Loading and Securement

Road wideners should be loaded on firm, level ground. The machine should be driven onto the RGN or lowboy under its own power when possible — this is safer and faster than crane loading. Once positioned, the machine should be chocked at all four corners and secured with a minimum of four heavy-duty chains rated for the machine's weight. Chains should be attached to the machine's designated tie-down points (typically marked on the frame) — never to hydraulic lines, cylinders, or attachments. The screed and any hydraulic attachments should be fully lowered and locked before securing. Re-check all tie-downs after the first 50 miles of travel.

Preparing Your Road Widener for Transport

• Retract all screed extensions to minimum transport width
• Fold ROPS if equipped and if it reduces transport height
• Lower and lock all hydraulic attachments
• Reduce fuel to approximately one-quarter tank
• Disconnect the battery or set the transport lock
• Document the machine's condition with photographs before loading
• Provide accurate weight, width, height, and length to your carrier for permit applications

IronHaul Logistics moves road wideners and paving equipment nationwide. Our team handles all permitting, pilot car coordination, and trailer matching. Request a free quote at ironhaullogistics.com, call (208) 495-2260, or email [email protected].