Provincial Highway 9 (Su-hua Highway) Road Repair and Traffic Control Information Partial Openings and Construction Traffic Controls (Road open at night)
1. Su-hua Highway (Provincial Highway 9) Heren to Chongde Section: Road Reopened for Two-way Traffic on November 2 at 11:00 AM
Due to Typhoon Kong-rey, a landslide of approximately 12,000 cubic meters occurred at the northern entrance of the Huide Tunnel (161.3 km mark) on the Su-hua Highway, burying part of the road and tunnel entrance. The Nan’ao Maintenance Works Division under the Eastern Region Branch Office of the Highway Bureau mobilized equipment and repair teams to begin emergency repairs as soon as conditions permitted on November 1. Through continuous efforts, the road was reopened for two-way traffic at 11:00 AM on November 2.
Given the proximity of the landslide to the road, additional work is needed to clear debris and improve drainage structures and sediment retention to enhance the highway's disaster resistance. Traffic control measures in the Heren (154.8 km) to Chongde (165.7 km) section are as follows:
November 2: Open from 11:00 AM to 2:00 PM and 5:00 PM to 7:00 PM. After all vehicles pass the control points at Heren and Chongde, the road will close until 6:00 AM the next day, with no nighttime access.
November 3, 6:00 AM - November 4, 8:00 AM: Open for continuous access, with no control measures.
Starting November 4: Regular weekday construction control from 8:00 AM to 5:00 PM, with three release periods each day:
10:00 - 10:20 AM
12:00 - 1:00 PM
3:00 - 3:20 PM
No control measures will be in place overnight (5:00 PM to the next morning 8:00 AM) or on weekends and holidays. All vehicles at Heren (154.8 km) and Chongde (165.7 km) control points during these release periods will be allowed to pass.
Weather reports indicate that the mountainous areas along the Su-hua Highway are likely to experience heavy short-term rain due to convective cloud formations in the afternoons, and the slopes remain unstable following recent earthquakes. Depending on weather and road inspection results, traffic control periods may be delayed or temporarily suspended if necessary. Flexible control measures will be implemented in case of unexpected road conditions or construction needs, so please follow the directions of traffic control personnel.
2. Su-hua Improvement Project: Zhongren Tunnel Southbound Closure (October 31 - November 30)
Section: Provincial Highway 9, Zhongren Tunnel
Contact Information: Nan'ao Maintenance Works Division at 03-9982161, 03-9962683
Dates/Times/Details: To carry out roadbed drainage improvements, the southbound Zhongren Tunnel will be closed around the clock from October 31, 5:00 PM to November 30, 5:00 PM. Alternative Route: Please use Provincial Highway 9D (Old Su-hua Highway). Work on drainage pipes will continue at the northbound tunnel entrance, though the northbound lane remains open. Traffic light control is in place at the Hezhong Weigh Station (148.86 km) for the northern control point.
3. Provincial Highway 9D (Nan’ao - Heping Section) Traffic Control for Slope Work (October 21 - December 31)
Contact Information: Nan'ao Maintenance Works Division at 03-9982161, 03-9962683
Section: Provincial Highway 9D, 37km+450 to 45km+000 (Nan’ao - Heping Section)
Dates/Times/Details: Slope work is underway daily from October 21 to December 31, from 8:00 AM to 5:00 PM, with flexible traffic controls in place. Road users should follow instructions from on-site traffic control personnel.
4. Provincial Highway 9 Su-hua Improvement Project (Nan'ao to Heping Section) - Hanben Viaduct and Heping Creek River Bridge Expansion Joint Replacement (November 26 - December 11)
Responsible Unit: Nan'ao Maintenance Works Division
Contact Number: 03-9982161, 03-9962683
Section: Su-hua Improvement Project at 142.3 km (Hanben Viaduct Southbound) and 143.1 km (Heping Creek Hechuan Bridge Northbound, Southbound)
Dates/Times/Details:
To replace the expansion joints of the Hanben Viaduct and Heping Creek Hechuan Bridge, the following construction schedule will be as follows:
November 26 to December 1: The northbound lane of the Heping Creek Hechuan Bridge at 143.1 km will be closed for the expansion joint replacement, and the road will be closed 24 hours a day. Road users are requested to detour via Provincial Highway 9D and follow on-site personnel's directions. We apologize for any inconvenience caused.
December 2 to December 11: The southbound lane of the Hanben Viaduct at 142.3 km and the northbound and southbound lanes of the Heping Creek Hechuan Bridge at 143.1 km will be closed 24 hours a day for the expansion joint replacement. Road users are requested to detour via Provincial Highway 9D and follow on-site personnel’s directions. We apologize for any inconvenience caused.
5. Provincial Highway 9 Su-hua Improvement Project - Su’ao Tunnel Lighting Maintenance (December 2 - 5, 2024)
Responsible Unit: Jinyue Maintenance Works Division
Contact Number: 03-9982501, 03-9962683
Section: Su-hua Improvement Project at Su’ao Tunnel
Dates/Times/Details:
December 2, 9:00 AM to 4:00 PM: Northbound lane (104km+437 to 104km+183) of the Su’ao Tunnel will undergo single-lane traffic control on the left side.
December 3, 9:00 AM to 4:00 PM: Northbound lane (104km+437 to 104km+183) of the Su’ao Tunnel will undergo single-lane traffic control on the right side.
December 4, 9:00 AM to 4:00 PM: Southbound lane (104km+183 to 104km+437) of the Su’ao Tunnel will undergo single-lane traffic control on the left side.
December 5, 9:00 AM to 4:00 PM: Southbound lane (104km+183 to 104km+437) of the Su’ao Tunnel will undergo single-lane traffic control on the right side.
6. Xin’ao Tunnel North Entrance (Provincial Highway 9, 117K+350 to 117K+450) - Traffic Control for Slope Protection Work
Responsible Unit: Nan'ao Maintenance Works Division
Contact Number: 03-9982161, 03-9962683
Section: Provincial Highway 9, 117K+350 to 117K+450 (Dong'ao to Nan'ao Section, Xin’ao Tunnel North Entrance)
Dates/Times/Details:
For slope protection work on the lower slope, flexible traffic controls will be in place from November 30 to December 8, daily from 8:00 AM to 5:00 PM.
During the work period, single-lane bidirectional traffic will be allowed.
There will be intermittent short-term road closures (approximately 30 minutes) depending on construction needs.
Please follow on-site traffic control personnel's instructions for safe passage.
Important Notice: Roads in mountainous areas may be prone to landslides due to earthquakes or heavy rainfall. Avoid using these roads unless necessary, and monitor weather forecasts and traffic updates in advance. Use the Highway Bureau’s Smart Road Information Service or download the “Happy Highway” mobile app for real-time updates. Drive safely!
For inquiries, please contact the following:
Nan'ao Maintenance Works Division: 03-9982161
Jinyue Maintenance Works Division: 03-9982501
Eastern Region Branch Office of the Highway Bureau: 03-9962683
Update Date: December 4, 2024
Info Posted by Taroko National Park Headquarters