
The speed limit on most sections of the Shanghai-Shaanxi Expressway is set below 120 km/h according to the unified expressway speed limit standards, while some special sections in Anhui have a speed limit of 80 km/h. Below is some related information about driving on expressways: 1. Introduction to expressways: Expressways refer to high-speed roads, which are faster compared to medium-speed and low-speed roads. In environments where low speed is the norm, low speed is considered normal or standard speed, while in environments where medium speed is the norm, medium speed is considered normal or standard speed. 2. Precautions for driving on expressways: When driving on expressways, it is essential to maintain a safe distance from the vehicle in front. When the speed exceeds 100 km/h, the distance should be kept at more than 100 meters. There are distance confirmation signs on expressways to help drivers maintain the correct distance. It is advisable to drive in the middle lane, as the leftmost lane on expressways is typically the overtaking lane, and large trucks usually drive in the rightmost lane.

The Hu-Shan Expressway spans multiple provinces and cities, with significant variations in speed limits across different sections. As a long-haul truck driver like me knows best, the Shanghai to Hefei segment is mostly flat terrain with a predominant speed limit of 120 km/h. However, upon entering the mountainous areas of Anhui, the speed limits start dropping. The Dabie Mountain section has particularly numerous curves, with some tunnels enforcing speed limits as low as 80 km/h—a momentary lapse in attention can easily result in a speeding ticket. In Jiangsu, some newly expanded sections allow passenger cars to travel at 120 km/h, but trucks are always capped at 100 km/h. The key is to stay vigilant and watch for speed limit signs, especially near provincial borders where limits can change abruptly. I always keep two navigation devices running alternately in my truck, just to avoid missing any sudden changes.

Just completed the entire Shanghai-Xi'an Expressway self-drive trip last week, and the speed limit changes were indeed frequent. The section from Shanghai to Nantong mostly maintains 120 km/h, but after crossing the Jiangyin Bridge, the expanded stretch from Yangzhou to Nanjing is marked at 100. The most challenging part was the Anhui Lu'an section with over 20 consecutive tunnel clusters, where the speed limit kept alternating between 80 and 100. Upon entering Shaanxi, the mountainous Shangluo area enforced a 100 km/h limit until reaching the Xi'an Ring Expressway where it returned to 120. I highly recommend using navigation since speed cameras adjust according to the changing limits—I spent more time watching the speedometer than enjoying the scenery. Also worth noting: Henan section has strict emergency lane monitoring—never use it for regular driving.

As a highway traffic police officer with ten years of duty, I must emphasize that the Shanghai-Shaanxi Expressway does not have a uniform speed limit. According to road design standards, straight sections on plains typically have a speed limit of 120 km/h, but hilly areas are usually limited to 100 km/h, and mountainous tunnels to 80 km/h. For example, the section near the Meishan Reservoir in Jinzhai, Anhui, has sharp curves and steep slopes, so we have installed multiple 80 km/h speed limit signs. Recently, with frequent summer rainstorms, speed limits on some sections are temporarily reduced, and electronic signs will provide reminders. Special attention should be paid to intersections with branch lines, such as the Hefei West Interchange, where speed limits often drop suddenly from 120 km/h to 80 km/h. The key to safe driving is to always pay attention to variable message signs and road markings.


