A TRAILER AND AN ASSOCIATED CONTROLLER

A trailer configured to be towed by a towing vehicle and carry one or more goods. The trailer comprises a chassis, a hitch to couple the trailer to a towing vehicle and a receptacle mounted on the chassis and defining a space to hold goods. The trailer comprises at least two wheels. An electric motor is mounted on each wheel, and the electric motors may be independently controlled to each wheel. The trailer comprises: one or more force sensors mounted on the trailer, at least one optical sensor mounted on the trailer, and optionally may include other sensors such as acoustic sensors. The trailer comprises a controller that is configured to process sensor inputs and determine a force on the hitch applied by the towing vehicle, determine an orientation of the towing vehicle and control the electric motor based on the determined force and orientation.