Advisory Curve Speed With a Swaying Trailer
You are driving a loaded pickup towing a 6,000-lb travel trailer southbound on a two-lane mountain road at night in light rain. A yellow diamond sign shows a right curve with a 35 MPH advisory plaque. Beyond it, chevron signs point right, and the pavement is wet with standing water near the outside edge. Your speed is 50 mph. The trailer begins to sway slightly as you enter the curve. A pickup behind you is tailgating. The road has no shoulder on the right, and a guardrail marks the outside of the curve. The centerline is double yellow. You see no oncoming headlights, but the curve continues beyond your headlights. Your trailer has no anti-sway hitch. Rain is steady. Your headlights are on low beam.
1. What does the 35 MPH advisory plaque mean legally, and how should it affect your speed given your trailer and the wet road?
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The yellow curve sign is a warning sign, and the 35 MPH plaque is an advisory speed, not a regulatory maximum. It represents a speed judged suitable for the curve under favorable conditions. The legally posted speed limit may be higher, but the basic speed law still requires you to drive at a speed that is safe for the curve, the wet pavement, your load, and visibility. With a 6,000-lb trailer, rain, night, and standing water, 50 mph is too fast. You should slow before the curve, using gentle braking while straight, and enter at or below 35 mph. The advisory is not a guarantee; if the trailer is unstable or water is deeper, go slower.
2. The trailer starts to sway. What should you do and not do?
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Ease off the accelerator and hold the steering wheel firmly with both hands, keeping the tow vehicle pointed straight ahead. Do not brake hard, jerk the wheel, or countersteer sharply, because those inputs can amplify the sway and cause a jackknife or loss of control. If the sway continues, slow gradually and look for a safe place to stop after the curve. Do not accelerate to try to pull the trailer straight unless you have specific training and conditions clearly support it; in a curve with wet pavement, gentle deceleration and a steady line are safer. The tailgating pickup does not change the need to regain control first.
3. How should you handle the tailgating pickup while entering the curve?
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Do not speed up to create distance, and do not brake suddenly to warn the driver. Both reactions increase the risk of losing control with the trailer. Maintain the safe speed you need for the curve, keep a steady line, and avoid abrupt inputs. If the pickup remains close, focus on the road ahead and the guardrail, and use a gentle tap of the brakes only if you must slow. After the curve, if there is a safe pullout, let the pickup pass. A double yellow centerline and no right shoulder mean you should not cross the centerline or stop in the curve to deal with the tailgater.