Overtaking while towing requires more effort from the driver, and more effort from the towing vehicle. Good judgment by the driver is essential to a successful and safe passage.
Of course, there are countless variables in every situation. These factors could include things like rain, harsh sunlight or strong winds. But in general, you should keep the following few key points in mind when you're passing while towing:
Signal early: When you're towing a trailer, it's a good idea to signal a little earlier than usual, just to alert other drivers around of your intentions. Ideally, they'll give you the extra space you need to pull off overtaking maneuvers.
Pass only on level ground: Never attempt to pass while towing on an incline or steep grade. Just keep in mind that you're towing a lot of trailer weight behind you, and your trailer won't behave the same as it would without a camper or boat attached. Trying to maneuver around slower traffic on a ramp could leave you trapped next to vehicles trying to overtake. Attempting to pass on a steep downhill may also result in unsafe higher speeds. Only pass on level ground if you have a clear view of what is ahead.
Use your mirrors: While it's important to see what's ahead, it's equally important to see what's behind you when overtaking. When you pull into a passing lane, use your mirrors to make sure another car isn't trying to overtake you. Your mirrors are also an important tool in determining when you can merge into your lane after overtaking is complete.
Use the steering wheel to move slowly: Enter the passing lane gradually and return to the travel lane slowly after overtaking. Never make sudden movements of the steering wheel when you are passing another vehicle. Quick movements of the steering wheel can cause the trailer to sway, which you definitely don't want.
Regain control of trailer sway: Trailer sway can be caused by a variety of reasons, such as high winds, rapid steering wheel movement at high speeds, or even wind from passing vehicles (including the one you're trying to overtake). Whatever the cause, trailer sway is always a little scary and hard to recover from, so you should know what to do if it happens. First, release the accelerator but avoid braking. Braking will only exacerbate the situation. With a firm grip on the steering wheel with both hands, let the vehicle slow down and straighten out. If you experience severe trailer sway, you should manually engage the trailer brakes. Again, do not use the tow vehicle brakes to stop the trailer from swaying.
Consider the extra length of the trailer: Simple as it may seem, many accidents are caused by drivers forgetting about the extra length of the trailer and returning to the driveway too early. Throughout the overtaking process, use your mirrors to prevent this from happening.
Be aware of where you are on the road: just stay alert, be aware of what's going on around you (in all directions), and perhaps most importantly, use good judgment.
