Speed limit of the upper connecting expressway 100 km. Brief Introduction of Hong Ping Expressway: Hong Ping Expressway refers to Pingxiang-Hongkou Street Expressway, which is located in Pingxiang City, Jiangxi Province and a section of Shangli (Hongkou Street)-Lianhua Expressway. It starts from Yejiaao Village near National Highway 320 in Pingxiang Economic Development Zone and ends at the junction of Jiangxi and Hunan in Jinshan Town (Hongkou Street) of Shangli County, connecting Changsha to Liuyang Expressway (Hongkou Street). Road traffic safety law: Article 78 Expressway shall indicate the lane speed, the maximum speed shall not exceed 120km, and the minimum speed shall not be less than 60km. The maximum speed of passenger cars, motor vehicles and motorcycles driving on the expressway shall not exceed 120km, 100km and 80km respectively. There are two lanes in the same direction, and the minimum speed of the left lane is100 km/h; There are more than three lanes in the same direction, the lowest speed of the leftmost lane is 1 10 km, and the lowest speed of the middle lane is 90 km. If the speed indicated by the road speed limit sign is inconsistent with the above lane speed, it shall be driven at the speed indicated by the road speed limit sign.