Tanker trucks are designed with safety as their top priority, especially when transporting flammable liquids like fuel or chemicals. One small but crucial safety feature is the chain hanging from the back of the truck. Although many people overlook it, this chain plays an essential role: it prevents static electricity from building up. As a tanker truck moves, friction from the road and the constant movement of liquid inside the tank can create static charges. If these charges are not released, they can produce sparks — a dangerous risk when carrying flammable materials.
