
AI-generated summary
Chiayi County Road 159A (Dahua Highway) was affected by the heavy rainfall of Typhoon Kemi in July 2024, causing geological instability in many road sections. Among them, a large erosion gully formed on the upper slope at 28K. After two years of monitoring, it was decided to build an open tunnel to avoid disasters.
Section 28K of Chiayi County Road 159A (Dahua Highway) will be closed for construction starting from the 11th of this month. (Photo by reporter Cai Zongxun)
Chiayi County Road 159A (Dahua Highway) was affected by the heavy rainfall of Typhoon Kemi in July 2024. Many road sections faced severe geological hazard challenges. After two years of monitoring, it was decided to build a new open tunnel to avoid disasters at 28K, and the entire line will be closed for construction starting from October 11, and vehicles must be rerouted. The 40.95K to 42K road section has also started a two-year preliminary monitoring since January 8 this year. Among them, the 41.8K section will undergo road resurfacing work at 8 a.m. today and the road will be closed for control.
Located at 28K of Line 159A at the junction of Dahu Village, Fanlu Township and Guanghua Village, Zhuqi Township, due to the steep mountains and extremely unstable geology, a large erosion gully has been formed on the upper slope after being washed away by typhoons and heavy rains. After two years of close monitoring and expert evaluation, the county government decided to build a 138-meter-long open tunnel for basic reconstruction. Construction is expected to begin on October 11, at which time the entire section of the road will be closed.
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Large-scale landslides have also occurred many times in the section 40.95K to 42K, causing cracking, subsidence and loss of roadbed on the road surface, posing a serious safety threat. In order to understand the collapse mechanism and disaster potential, the Chiayi County Government selected and commissioned a professional agency to perform a two-year preliminary monitoring. It was fully launched on January 8 this year and continues to conduct in-depth investigations and evaluations to develop the best remediation plan.
During the monitoring period, in order to maintain vehicle driving safety and road smoothness, the county government plans to implement a road resurfacing project at 41.8K of County Road 159A. The construction unit has implemented road closure control since 8 a.m. today and is expected to continue the operation for several days. The control time will be flexibly adjusted based on the actual progress of the project. Passengers traveling on this road section are reminded to plan their routes in advance.
Chiayi County Road 159A (Dahua Highway) 28K severely collapsed. (Photo by reporter Cai Zongxun)
AI outlook — possibilities, not facts
The Ming Tunnel at Section 28K of Chiayi County Road 159A will begin construction on October 11
Very likely · Within days
The road repaving project at 41.8K will last for several days
Likely · Within days

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