When a car is towing a trailer, it generally has reduced stability, longer stopping distances, and different handling characteristics compared to a car driving without a trailer. For this reason, speed limits for vehicles towing trailers are lower than those for regular cars.
Lower Speed for Safety:
A trailer adds extra weight and affects braking efficiency. Driving at high speeds increases the risk of jackknifing (when the trailer swings out of control).
High speeds can also cause trailer sway, making it harder to control the vehicle.
Speed Limits on Different Roads:
On motorways and dual carriageways, the speed limit for cars towing trailers is often set lower than for regular vehicles to reduce the risk of high-speed instability. That’s why the limit is 90 km/h instead of 100 km/h.
On conventional roads, where traffic conditions are more variable, the speed limit is further reduced to 80 km/h to allow better reaction times and safer braking.