What is the limit of Guizun high-speed bus?

100 km/h. The design speed of Zungui Expressway is big car100 km/h and small car 120 km/h, so the speed limit of passenger cars is100 km/h. Guizhun Expressway is an expressway connecting Guiyang, the capital of Guizhou, to Zunyi, a revolutionary city. It is a part of the national highway -G75 Blue Ocean Highway (Lanhai). It is also an important part of the "five vertical and seven horizontal" national trunk line from Chongqing to Zhanjiang.