
The speed limit on the Hangchang Expressway is 100 km/h. Here are some precautions for driving on the expressway: Expressway entrance: There are very strict requirements when entering the expressway entrance ramp, prohibiting overtaking, U-turns, stopping, and reversing. Merging into expressway traffic: When merging from the ramp into expressway traffic, always yield to others, use turn signals, honk, observe, and confirm that you are not affecting other vehicles before entering the expressway lane. Pay attention to expressway signs: There are many signs on the expressway, and failing to notice them may lead to serious consequences.

I've been driving on the Hangzhou-Changsha Expressway for seven or eight years, and the road conditions here are actually quite complex. For passenger cars, the usual speed limit is 120 km/h, while for large vehicles it's around 100 km/h. However, you need to pay attention to specific sections—tunnels and bridge areas often have speed limits of 80 to 100 km/h, and some parts of the Hangzhou Ring Road are even limited to 100 km/h. In Jiangxi province, where there are many mountainous areas, speed limit signs of 100 km/h can suddenly appear. There are also quite a few average speed cameras installed; once I was caught going just 10 km over the limit. Additionally, during rain or snow, the speed limits are automatically reduced, which navigation systems won't alert you about—you have to keep an eye on the speed limit signs yourself.

Last week, I just finished a self-drive trip on the Hangchang Expressway. Generally, the speed limits fluctuated between 100 and 120 km/h. However, extra caution is needed in tunnels—several long tunnels in the Chun'an section are limited to 80 km/h, while the newly built sections near Tonglu maintain a consistent 120 km/h limit. A truck driver friend reminded me that they get ticketed for speeding if they exceed 100 km/h, while passenger cars occasionally driving at 125 km/h might not be immediately penalized, but safety comes first. Recently, with the hot weather and high road surface temperatures, some temporary zones have reduced speed limits to 60 km/h.

The speed limit on the Hangchang Expressway mainly depends on the vehicle type and road section. The basic speed limit for passenger cars is 120 km/h, while large trucks are only allowed to drive at 100 km/h. Special attention should be paid to the section from Hangzhou to Quzhou, where three new interval speed monitoring points were added last year. I heard from traffic police at Deqing Service Area that during peak hours in the morning and evening, some ramp entrances are temporarily adjusted to a speed limit of 80 km/h. By the way, there must be a 60 km/h speed limit sign 1 kilometer before entering the service area, which many people don't notice.

During my test drive on the Hangchang Expressway with a new energy vehicle, the navigation showed an average speed limit of around 110 km/h throughout the journey. The mountainous section in Pingxiang, Jiangxi had many continuous downhill stretches where the sudden speed limit drop to 80 km/h felt quite tricky. The newly repaved section from Jinhua to Zhuji direction last year had its speed limit raised to 120 km/h, but electronic monitoring devices were installed at intervals. Practical testing revealed that speeding within 10% generally went unpunished, but exceeding the limit by 5 km/h in tunnels would definitely result in fines. During rainy days, the system automatically activates an 80 km/h limit, proving more responsive than manual patrols.

A long-distance coach driver who frequently travels the Hangzhou-Changzhou route told me that the key to navigating this highway is to pay attention to the real-time road signs. The main lane is marked at 120 km/h, but the overtaking lane might allow 130 km/h. Currently, the section leaving Hangzhou city is under , and the speed limit has been reduced to 100 km/h for the entire stretch. According to the latest traffic regulations I checked, medium-sized and larger buses are limited to 100 km/h, while hazardous material vehicles can only drive at 80 km/h. Near the Longyou Service Area, there are continuous curves where temporary speed limits of 80 km/h are often imposed in summer, reverting to 100 km/h in winter. Additionally, sections passing through villages have an extra 20% speed reduction at night.


