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Partial Opening | Controlled Construction | Nighttime Road Closures
Provincial Highways 8, 9, and 14A Traffic Control Information (September 2025)

Provincial Highway 8 (Central Cross-Island Highway, Dayuling → Taroko Entrance)
Traffic Control Measures for September 2025
Partial Openings | Controlled Construction | Nighttime Road Closures
Since the April 3, 2024 earthquake, the Taroko Maintenance Section of the Eastern Region Branch, Directorate General of Highways (DGH), has been balancing reconstruction progress with the transportation and livelihood needs of local residents. At the end of each month, the Section convenes residents, civic groups, local businesses, and relevant agencies from the Tianxiang area to discuss and finalize the following month’s traffic control plan.
The following measures apply for September 2025:
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I. Guanyuan → Tianxiang (114.6 km – 167.3 km)
• After daily morning patrols and rockfall clearing confirm safety, traffic will be open 06:00 – 16:30.
• 16:30 – 18:30: control gates at 114.6 km (Guanyuan / Hehuan Police Station) and 167.1 km (Tianxiang, west end) will be closed. Exit only, no entry.
• 18:30 – 06:00 (next day): full nighttime closure.
Controlled Work Zones within this section:
Km marker Location Control Type
117.4 km Guanyuan section Scheduled releases: 06:00–08:00, 10:00 (once), 12:00–13:00, 15:00 (once), 16:00–18:30
141.6 km Xinbaiyang section Dynamic control
147.0 km Hualu River section Dynamic control
147.8 km Ciyun Bridge Hourly release on the hour, 10 minutes each hour
157.7 km Huoran Pavilion section Dynamic control
After the morning patrol confirms the road is safe, five daily release windows will be implemented:(1) 06:30 – 08:00 (2) 10:00–10:05 (3) 12:00–13:00 (4) 15:00–15:05 (5) 17:00–17:30

Note: During the short 10:00 and 15:00 releases, only vehicles already waiting at control gates may pass. Please arrive to the control point 10 minutes ahead of the release time.

17:30 – 18:30: control gates at 167.7 km (Tinaxiang, east end) and Shakadang Tunnel east portal will be closed – exit only, no entry.

18:30 – 06:30 (next day): nighttime road closure.

Controlled Work Zones within this section (08:00 – 16:00 daily):
Kilometre Location Control Type
173.5 km Jiuqudong Tunnel east portal Released with general 5-time schedule
175.5 km Jinheng Tunnel west portal Released with general 5-time schedule
179.5 km Xipan section Dynamic traffic control
180.5 km Ning'an Bridge west end Dynamic traffic control
183.1 km Near Changchun Bridge Dynamic traffic control

Vehicles waiting at either end of the above work zones during release times will be allowed to pass before road closure resumes.

One-way split traffic (Taroko Entrance ↔ Changchun Tunnel):

Westbound (Taroko → Tinaxiang): Shakadang Tunnel → Xila’an Tunnel → Changchun Tunnel → Tinaxiang.

Eastbound (Tinaxiang → Taroko): Provincial Highway 8 → Changchun Tunnel → Taroko Entrance.

III. Temporary / Mobile Work Zones

Short-term traffic control for additional projects (e.g., asphalt milling and paving) will be conducted dynamically and will coordinate with existing control gates and release windows to minimize impact. If necessary, separate announcements will be issued.
Important Reminder for Drivers (Full 74 km section: Dayuling → Taroko Entrance)

Eastbound (Dayuling → Taroko): You are advised to reach Tinaxiang before 17:00 to avoid missing the 17:00 – 17:30 release window.

Westbound (Taroko → Dayuling): You are advised to pass the Shakadang Tunnel east portal before 15:00 to avoid missing the 16:30 westbound closure at Guanyuan.

Due to ongoing slope stabilization and road repairs, traffic release times may be delayed or cancelled without notice due to weather or emergency conditions. Drivers should plan accordingly and check for real-time updates.

Stay informed via:

DGH Real-Time Provincial Highway Info: https://168.thb.gov.tw

“Happy Highway” App: download via app stores

Local traffic broadcasts

Drive safely and plan ahead!

Contact Information
Taroko Maintenance Section, Eastern Region Branch, DGH
Road Condition Hotline: 03-9962683
Contact Person: Section Chief Chang Pei-Yun (03-8610775)

Last update: September 1, 2025
For the latest updates, please contact the Taroko Maintenance Section.

Road Open/ Road Repair Construction Traffic Control

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Provincial Highway 9 – Construction and Traffic Control Notice (September 2025)
1. Suhua Improvement Project: Su’ao to Dong’ao Section
1. 104.9 km – 107 km (Baimi River Bridge Elevated Section)
Mobile road sweeping every Tuesday, 10:00 – 11:00. Please follow on-site instructions and drive cautiously.
2. 104.1 km – 113.4 km (Su’ao Tunnel, Dong’ao Tunnel, Dongyue Tunnel)
Electrical and Mechanical (E&M) inspection and maintenance from January 2 to December 31, 2025, daily 08:00 – 18:00 (excluding holidays). Fixed-location operations in turnout bays. Please drive carefully and follow traffic controllers’ instructions.
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2. Provincial Highway 9D – 16.9 km – 21.7 km (Dong’ao Section)
Road resurfacing works from August 25 to September 28, 2025, daily 19:00 – 07:00 (next day). Single-lane, alternating two-way traffic under dynamic control. Slow down and follow on-site personnel. No work on holidays; postponed in case of rain.
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3. Provincial Highway 9 – 113.0 km – 113.4 km (Dong’ao Section)
Median soil stabilization works from September 1 to September 12, 2025, daily 08:00 – 17:00. Southbound inside lane closed. Please follow traffic controllers’ instructions. No work on holidays.
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4. Provincial Highway 9 – 117.2 km (Dong’ao Section)
Slope stabilization works from August 6 to September 3, 2025, daily 09:00 – 17:00. Dynamic traffic control in effect. Please follow on-site personnel. No work on holidays.
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5. Provincial Highway 9D – 16.9 km – 21.7 km (Dong’ao Section)
Road resurfacing works (same as Item 2): August 25 – September 28, 2025, daily 19:00 – 07:00 (next day). Single-lane, alternating two-way traffic under dynamic control. No work on holidays; postponed in case of rain.
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6. Suhua Improvement Project: Nan’ao to Heping Section
1. 125.5 km – 126.7 km (Nan’ao Beixi Bridge)
Road sweeping every Wednesday, 10:00 – 11:00.
2. 142.9 km – 144.35 km (Heping River Bridge Elevated Section)
Mobile road sweeping every Wednesday, 14:00 – 15:00.
3. 124.5 km – 145.1 km (Nan’ao to Heping Section)
E&M inspection and maintenance from January 2 to December 31, 2025, daily 08:00 – 21:00 (excluding holidays). Fixed-location operations in turnout bays.
4. 124.5 km – 145.1 km (Gufeng Tunnel, Suhua Improvement)
Traffic control system maintenance and installation works:
o September 8, 09:00 – 21:00: Southbound closed.
o September 9, 09:00 – 21:00: Northbound closed.
Please detour via Provincial Highway 9D and follow on-site personnel.
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7. Provincial Highway 9D – 38.35 km – 45.05 km (Guanyin to Aohua Section)
Four slope stabilization sites under construction from June 17 to October 31, 2025, daily 08:00 – 17:00. Dynamic traffic control in effect. No work on holidays.
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8. Suhua Improvement Project: Hezhong to Heren Section
1. 149.1 km – 153.9 km (Zhongren Tunnel)
E&M inspection and maintenance from January 2 to December 31, 2025, daily 08:00 – 21:00 (excluding holidays).
2. 148.8 km – 154.2 km (Zhongren Tunnel)
Mobile sweeping every Thursday, 14:00 – 16:00.
3. 149.1 km – 153.9 km (Zhongren Tunnel, Suhua Improvement)
Traffic control system maintenance and installation works:
o September 15, 21:00 – September 16, 01:00: Southbound closed.
o September 17, 21:00 – September 18, 01:00: Northbound closed.
Please detour via Provincial Highway 9D.
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9. Provincial Highway 9D – 61.2 km – 61.5 km (Heren Section)
Slope trimming works from August 7 to August 31, 2025, daily 08:00 – 17:00. Traffic released every 30 minutes for 5 minutes under alternating two-way control. No work on holidays.
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10. Suhua Improvement Project: Heren to Daqingshui Section
1. 155.0 km – 158.2 km (Renshui Tunnel)
Mobile sweeping every Thursday, 10:00 – 11:00.
2. 155.0 km – 158.2 km (Renshui Tunnel)
E&M inspection and maintenance from March 3 to December 31, 2025, daily 08:00 – 18:00 (excluding holidays).
3. 155.1 km – 158.0 km (Renshui Tunnel, Suhua Improvement)
Traffic control system maintenance on September 16, 20:00 – 22:00: Southbound closed, alternating northbound one-lane two-way traffic.
On September 16, 22:00 – 24:00: Northbound closed, alternating one-lane two-way traffic.
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11. Provincial Highway 9 – 158.3 km – 164.3 km (Heren to Chongde Section)
Guardrail repair works from July 24 to August 31, 2025, daily 08:00 – 17:00. Alternating single-lane two-way traffic. No work on holidays.
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12. Provincial Highway 9 – 161.3 km – 162.8 km (Huide Tunnel)
Tunnel drainage improvement works from September 1 to December 30, 2025, 19:00 – 17:00 (next day). Continuous alternating one-lane two-way traffic. No work on holidays (including preceding nights).
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13. Provincial Highway 9 – 164.5 km (Chongde Section)
Bridge reconstruction works from July 7 to December 23, 2025. Original bridge closed. Please use temporary detour roads. No work on holidays.
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Reminder for Mountain Roads
Due to earthquake impacts, falling rocks are common. Avoid entering mountain roads during or after heavy rainfall. Always monitor weather forecasts and road condition updates, and plan accordingly.
Stay informed via:
• DGH Real-Time Provincial Highway Info: https://168.thb.gov.tw

Open/

Provincial Highway 14A – Traffic info

While traveling on the above section, please monitor roadside Variable Message Signs (VMS) for the latest traffic updates. The DGH Traffic Control Center will issue real-time traffic information and driving advice as conditions change.

For traffic diversion plans and live road conditions, please visit:

DGH official website: http://www.thb.gov.tw

Provincial Highway Real-Time Info Service: http://168.thb.gov.tw

"Happy Highway" mobile app

Toll-free service hotline: 0800-231-035

The Directorate General of Highways wishes you a safe journey.
Contact Information

Responsible Unit: Puli Maintenance Section, Central Region Branch, DGH
Road Condition Hotline: 049-2982066
Contact Person: Section Chief Chiu Bing-Rong
Latest Road Information

Last update: 1 September 2025
For the latest information, please contact the DGH managing offices.

For inquiries about Central Cross-Island Wushe Branch Road (Provincial Highway 14A), please contact:

Taroko Maintenance Section: 03-8610775

Puli Maintenance Section: 049-2982066

Note: The above information is current as of 1 September 2025. For any updates, please contact the respective managing offices.