The difference between single-drive and dual-drive semi-trailers

Single-drive dual-guide means there are two rows of steering wheels and one row of driving wheels; dual-drive single-guide means there are two rows of driving wheels and one row of steering wheels.
Generally speaking, there are more dual-drive single-guide vehicles, which have good passability and greater power. The disadvantage is that the steering reliability is insufficient. Single-drive and dual-drive vehicles are not common. Generally, there are two rows of four wheels under the cab. The advantages of these vehicles are high steering safety and better stability.