Petrol tankers are vehicles specifically designed for the transportation of gasoline, a highly flammable and volatile fuel. The construction of petrol tankers emphasizes safety, with tanks typically made from steel or stainless steel and often featuring double - walled designs to prevent leaks. Advanced safety systems include emergency shut - off valves that can quickly halt fuel flow in case of an accident, vapor - recovery systems to minimize the release of flammable vapors, and electrostatic - grounding devices to prevent static - induced fires. These tankers also have efficient pumping mechanisms and precise metering systems to ensure accurate loading and unloading of petrol, enabling the safe and reliable delivery of gasoline from refineries to gas stations and other distribution points.