For many truck drivers, hauling double trailers—or “doubles”—can be a smart way to boost income and expand skills. But it’s not just about hooking up two trailers and hitting the road. There’s a lot to understand before getting behind the wheel with doubles, from legal requirements to handling challenges.
What Are Doubles?
Doubles mean pulling two trailers connected by a converter dolly behind a tractor. This setup is common in Less-Than-Truckload (LTL) freight, allowing carriers to move more freight per trip. A higher level of skill and attention is demanded because doubles are longer and heavier than single trailers.
CDL Endorsements and Training
To haul doubles legally in the U.S., drivers need a Doubles/Triples endorsement, often called the T endorsement, on their Commercial Driver’s License (CDL). This involves passing a written knowledge test specific to handling doubles and triples, covering safe coupling, air brake systems, and more.
While a formal behind-the-wheel test for doubles is not always required, many companies offer or require specialized training to help drivers get comfortable with the unique demands of doubles.
Benefits of Driving Doubles
- Increased Earning Potential: Due to the added responsibility and complexity, doubles drivers typically earn more than those hauling single trailers. According to recent data, experienced doubles drivers can make upwards of $90,000 annually depending on region and employer.
- Efficiency: Hauling two trailers can mean fewer trips for the same amount of freight, improving fuel efficiency and delivery speed in some operations.
- Skill Development: Mastering doubles improves your overall driving skills, especially with backing, turning, and spatial awareness.
Challenges to Keep in Mind
- Maneuverability: Doubles are longer and less forgiving in tight spaces. Navigating city streets, sharp turns, and parking requires patience and practice.
- Parking and Rest Stops: Finding parking spots that can accommodate doubles can be tough, so planning rest breaks becomes even more critical.
- Weather Sensitivity: Because doubles have a larger surface area, they can be more affected by wind and slippery conditions.
Driving doubles isn’t for every trucker, but for those looking to advance their career and increase earnings, it’s a valuable skill set. If you’re considering this path, focus on getting the proper T endorsement and seek out quality training. Always prioritize safety, plan your routes carefully, and take your time mastering the maneuvering challenges doubles bring.
