Australian outback truckers addressing enormous distances on tough and unsealed roadways must equip their rigs with special modifications. They include a huge bull-bar (roo-bar), a sheet of wire mesh for windscreen security, special dust filters, additional long range gas tanks, high quality tires, airconditioning and numerous different driving lights. Bulk goods are typically transported in Road Trains, that may have around 3 trailers with a complete length of over 31 metres.