The generating units for the highways generally include mobile diesel generators and fixed diesel generators. It is widely used in service area and highway construction. According to function: ordinary type generator set, automatic generator set, monitoring type generator set, automatic switching type generator set, automatic combination type generator set. According to the structure: open shelf type generator, box type generator set, mobile generator set. A generator can be divided into: box type rainproof box generator, low noise generator, mute generator, container station. The mobile generator set can be divided into tow parts: trailer type diesel generator set and mobile diesel generator set.