Two ways the term is used
Some people say "steer car" to mean a vehicle that helps a long load through tight turns. Others mean the person who actually steers part of the trailer. Because the word is used loosely, it is worth asking exactly what a company means when it quotes a steer position.
The tillerman or steerman
FHWA's guidance on special challenges defines a tillerman or steerman as an individual who steers any axle of an articulated trailer. This steering helps stop the trailer from offtracking into other lanes or vehicles or off the road. FHWA reports that the Federal Motor Carrier Safety Administration revised its guidance in 2011, concluding that a person steering a rear axle from outside the vehicle, under the direction of the driver in the cab, is a tillerman rather than a driver.
Not the same person as the pilot car driver
FHWA states that it is not recommended, and unlawful in many states, for one person to do two driving tasks at once, meaning escorting and steering the trailer at the same time. In many states a steerman must hold a Class A commercial driver's license. As FHWA points out, the way to be sure is to ask the state agency that handles oversize permits and operators.
When steering support is used
Long or articulated trailers can swing wide or track off the road in tight turns and intersections. Steering support, together with lead and chase escorts, helps position the load where clearance is limited. The permit and the trailer design decide whether it is needed.
What to tell your escort company
- The trailer type and whether it has a steerable axle.
- Overall length, width and any overhang.
- The route, especially tight turns and intersections.
- Whatever your permit says about steering support.
Talk to dispatch
If your trailer needs steering support, tell us the details and we will confirm what your move needs. See our steer escort service or request a quote. For the basics, start with what a pilot car is.