Oil tanker trailers are trailers designed for transporting various types of oil, including crude oil and refined petroleum products. These trailers typically have large - capacity tanks constructed from durable materials such as steel or stainless steel to withstand the weight and pressure of the oil during transit. Safety features are critical, including double - hull structures, emergency shut - off valves, and leak - detection systems to prevent spills and ensure the safe movement of the fuel. Oil tanker trailers are equipped with high - performance pumping systems for efficient fuel transfer and accurate metering devices to measure the volume of oil being transported. They are essential for the overland transportation of oil, connecting refineries, storage facilities, and end - users.