What is the speed limit on the Da-Guang Expressway?

[VonCamilla]

The speed limit on the Da-Guang Expressway ranges from 80 to 120 kilometers per hour. The route starts from Daqing City in Heilongjiang Province in the north, passing through Jilin Province, Inner Mongolia Autonomous Region, Beijing, Hebei Province, Henan Province, Hubei Province, and Jiangxi Province, and ends in Guangzhou City, Guangdong Province in the south, with a total length of 3,550 kilometers. It is a two-way four to six-lane expressway with an emergency lane and is the fifth north-south route in the national expressway network plan. The Jiangxi section starts from Bijia Mountain in Lixi Town, Wuning County, Jiujiang City, passing through Xiushui County, Yifeng County, Shanggao County, Xinyu City, Anfu County, Ji'an City, Ji'an County, Taihe County, Wan'an County, Suichuan County, Ganzhou City, Xinfeng County, Longnan County, and Quannan County, ending at Huangkeng Village, Yangcun Town, Longnan County (at the Jiangxi-Guangdong border), with a total length of 586.5 kilometers.

[LeStephanie]

I've driven on the Da-Guang Expressway many times, and the speed limits really depend on the specific sections. For cars, it's generally 120 km/h, but it drops straight to 100 in areas with lots of curves. Some long mountain tunnels even have 80 km/h signs, which gave me a scare. Trucks have it worse—I've seen several sections with 90 km/h limits. A word of advice: the speed limits change frequently when you first enter Henan, so it's best to keep your navigation on for real-time alerts. Speeding tickets are one thing, but the real issue is how slippery the road gets in the rain. I once saw a car lose control and crash into the guardrail in a 90 km/h zone.

[OMaggie]

After actual testing of the speed limit changes along the entire G45 Da-Guang Expressway, the design speed indeed reaches a maximum of 120 km/h. However, sections like the mountainous road from Ji'an to Ganzhou suddenly drop to 100 km/h on signage, almost causing me to brake too late. A truck driver friend complained they're perpetually restricted below 100 km/h. The most frustrating part is provincial border transitions—last week entering Henan from Hebei, the speed limit abruptly dropped by 20 km/h. Guangdong's Heyuan section has seven or eight fixed speed traps; during Qingming Festival, I saw three cars lined up paying fines. Now wiser, I set cruise control at 110 km/h for optimal safety.

[DiLucas]

Last month, I specifically noted the speed limits while driving the entire stretch of the Daguang Expressway: a steady 120 km/h on the four-lane sections, dropping to 110 km/h on the three-lane sections. The gantry cameras are mostly concentrated within 10 kilometers before and after service areas, with speed limit signs providing a 2-kilometer advance notice. Be cautious in the Dawu Tunnel Cluster in Hubei, where five consecutive tunnels all have an 80 km/h limit. Electric vehicle drivers should be careful, as regenerative braking on long descents can easily push the speed past 110 km/h. In the Chengde section of Hebei, winter speed limits are reduced, with 80 km/h signs posted as early as November. Emergency lane cameras now come with speed detection capabilities.

[LaClayton]

Compared the speed limit differences between the north and south. Most sections of the G45 Da-Guang Expressway in Hebei have a 120 km/h limit. When passing through Xinyang, Henan, it drops to 100 km/h. Later research revealed this is a high-accident zone. Now service areas display accident photos - one SUV crashed into a ditch after reaching 130 km/h in a 100 km/h zone. Mountainous sections often have 70-80 km/h average speed control zones, typically over 10km long. Truck drivers are advised not to follow too closely - last month I witnessed two trucks with less than 50m spacing fail to brake in time and collide. After rain, definitely slow down when passing Meiguan Tunnel - the road surface reflects light extremely intensely.

[DelJeremiah]

During my last road trip, I noticed some details: The speed limit sign at the starting point of the Guangdong section was 120 km/h, but 30 kilometers later, there was a temporary speed limit sign of 80 km/h. In the road construction section of Chenzhou, Hunan, three speed bumps were installed, and passing trucks had deformed them. Near a gas station in the Jiangxi section, the speed limit suddenly dropped to 60 km/h, and my navigation didn't alert me in time, resulting in a flash from a speed camera. My car recorder captured an interesting fact: New smart road signs in the Chifeng section of Hebei automatically display a reduced speed limit of 80 km/h during rainy weather. The most reliable practice on the entire highway is to watch the overhead variable message signs, which update road conditions more promptly than mobile navigation.