Parallel parking a trailer is widely considered the most difficult backing maneuver a driver can face. But like all backing skills, it comes down to understanding a few key principles and practicing them in a consistent sequence. This guide breaks it down step by step so you can master it.
Before You Start: The Basic Principle
Trailer backing works opposite to your instincts. When you turn your steering wheel left, the trailer goes right. When you turn right, the trailer goes left. The key is to use small steering inputs, move slowly, and correct early — before the trailer’s angle gets out of control.
For parallel parking, you’re essentially performing a jackknife maneuver in a controlled way, then straightening out as the trailer slides into the space. It helps to think in terms of where you want the trailer to go, then steer the opposite way.
Setting Up: Positioning Before the Maneuver
Good parallel parking starts before you begin backing. Pull past the space and position your rig so the trailer’s rear is aligned with the front of the open spot — just as you would in a regular car. Aim to be about one to one-and-a-half trailer widths away from the parked vehicles or curb. The more space you give yourself laterally, the better your angle will be.
Step-by-Step: How to Parallel Park a Trailer
Step 1: Pull Past the Space
Drive past the parking spot until the rear of your trailer is approximately even with the front edge of the open space. Stop with your rig parallel to — and offset from — the row of parked vehicles. Leave yourself room to swing the rear of the truck out.
Step 2: Begin Backing — Steer Toward the Space
Shift into reverse and begin backing slowly. Turn your steering wheel toward the parking space (toward the curb). This pushes the trailer away from you — toward the opposite lane — while the rear of your truck swings toward the curb. The trailer will begin to angle into the space.
Use your mirrors constantly. Watch the trailer’s rear corner that’s nearest to the parked vehicles at the back of the space — that’s your critical reference point.
Step 3: Watch Your Angle — Don’t Over-Rotate
As the trailer swings into the space, watch the angle developing between the truck and trailer. You want the trailer to enter the space at roughly a 30–45 degree angle before you begin straightening out. If you let the jackknife angle grow too sharp, you’ll run out of room to correct and may hit the vehicles on either side.
Step 4: Straighten the Truck — Steer Away from the Space
Once the trailer is entering the space at the right angle, steer away from the curb (the opposite direction). This straightens the hitch angle and brings the rear of the truck into line with the trailer. Continue backing slowly, making small adjustments to keep the trailer tracking toward the center of the space.
Step 5: Straighten Everything Out
As the trailer slides deeper into the space, straighten your steering wheel and allow the rig to roll back until the trailer is fully inside the space and parallel to the curb. You may need to make small left and right corrections to avoid crowding either end of the space.
Step 6: Final Position Adjustment
Once the trailer is in the space, pull forward slightly if needed to center it, then back up again to get the truck into the space as well. A parallel-parked combination vehicle often takes more than one back-and-forth movement to get fully dialed in — that’s normal.
Tips for Success
- Go slow. Speed is your enemy when backing a trailer. The slower you move, the more time you have to see and correct problems before they become unrecoverable.
- Use a spotter if you have one. A spotter standing at the rear corner of the trailer can call out clearances you can’t see in your mirrors.
- Use your mirrors, not just the backup camera. Cameras show you what’s directly behind you but often don’t show the full angle of the truck-trailer relationship. Your side mirrors give you a better overall picture.
- Practice the “hand-on-bottom-of-wheel” trick. Many experienced drivers find it intuitive to place their hand on the bottom of the steering wheel and move it in the direction they want the trailer to go. Move your hand left → trailer goes left.
- Reset when it goes wrong. If you get the angle too steep or the trailer starts going the wrong way, pull forward and start over. Trying to rescue a badly jackknifed position usually makes things worse.
How Long Does It Take to Learn?
Most drivers with moderate backing experience can get the basic technique down in 30–60 minutes of focused practice in an empty parking lot. Full competence — being able to do it reliably in a tight real-world space — typically takes several dedicated practice sessions. Set up cones in an empty lot and drill the sequence until it becomes muscle memory before you attempt it in a crowded campground or marina.
Build your backing skills from the ground up — read our guides on how to back up a trailer and how to back a boat trailer. For a broader look at vehicle backing safety standards, the FMCSA’s backing safety guidelines cover techniques applicable to any combination vehicle.