
Shenhai Expressway has a maximum design speed limit of 120 kilometers per hour. However, it should be noted that this is the design speed limit, and the actual speed limit may vary depending on the section and vehicle type. Please refer to the speed limit signs on specific sections, as many sections generally have speed limits ranging from 100 to 110 kilometers per hour. Here is more detailed information about the speed limits on Shenhai Expressway: 1. Traffic police may impose speed limits in accident-prone areas, such as sharp curves, long slopes, or tunnels, where the speed limit could be as low as 80 kilometers per hour. 2. The speed limit also depends on the type of vehicle being driven. For passenger cars, the maximum speed limit is 120 kilometers per hour, while for large trucks, it is 100 kilometers per hour. Some expressways allow motorcycles, which have a lower speed limit of 80 kilometers per hour.

The speed limits on the Shenhai Expressway vary by province and section. In Shandong and Jiangsu sections, I mostly see speed limit signs of 120 km/h for passenger cars. However, some long tunnels reduce the limit to 80 km/h, like the Jiaozhou Bay Tunnel, which is particularly noticeable. Be extra cautious in sections under expansion or construction, as temporary speed limits of 60 km/h are common there, and navigation systems might not always alert you, making it easy to get caught. Truck drivers should note that most sections have a limit of 100 km/h for you. For long-distance travel, it's advisable to keep your navigation on, as it's better at promptly detecting speed limit changes than the human eye.

I've driven a small car all the way from Dalian to Haikou. The main highway sections can indeed maintain 120 km/h, but you need to ease off the throttle when crossing provincial borders or entering urban areas. The Zhangzhou section in Fujian has many mountainous roads with numerous curves limited to 100 km/h. In the Qingdao section, even the three-lane overtaking lane is limited to 120 km/h, but the middle lane is often marked at 100 km/h. Large trucks must consciously reduce speed, and those with faded reflective stickers are prone to getting tickets at night. When passing through the Yangjiang section during rain, I've seen electronic signs dynamically adjusting the speed limit to 90 km/h.

Actual tests on the Guangzhou-Shantou section show a uniform speed limit of 120 km/h for passenger cars on three-lane highways. However, the mountainous Heyuan section frequently has crosswind warning zones where speed limit signs suddenly drop to 100 km/h. Special attention is required for tunnel clusters in the Wenzhou direction with 80 km/h limits – these tunnel entrances have numerous flashing speed cameras. For safer driving, it's advisable to maintain 5 km/h below the posted limit, which helps avoid accidental captures by overhead speed monitoring devices.


