Construction control at 4 locations on the Alishan Highway caused traffic congestion, and the public works section urged early departure

Provincial Route 18 Alishan Highway continues to carry out safety optimization projects. In addition to the two open tunnel projects of 58.5K and 70.1K, single-lane two-way traffic control is implemented. The two steep slope curves of 38.5 and 60.2K are also undergoing improvement projects. Single-lane two-way traffic control is also implemented. That is to say, passers-by going to Shichu and Fenqi Lake will encounter 3 control points, and up to 4 control points in the Alishan National Forest Recreation Area. The Alishan Public Works Section reminds passers-by to allow more time to go up the mountain to avoid delaying the journey, and be sure to obey the traffic signs, otherwise haste will make trouble.

The Public Works Department stated that large vehicles often get stuck in the 38.5 and 60.2K sections because they did not change to low speed in advance, causing traffic jams on the road. The main purpose is to improve and adjust the longitudinal slope roadbed of the curve. The excavation and fill balance of the former roadbed has been adjusted from the original 12.9% longitudinal slope to 8.2%, making it smoother for large vehicles to go uphill. Traffic control personnel will be arranged to direct these four construction control sections during the day, and if necessary, the traffic control section will be extended to 8 pm. Light signals will be used at night. Please be sure to obey the instructions and follow the signs.

"Alishan Master" Huang Yuanming pointed out that the Alishan Highway is entering a "dark period" of intensive construction. The first hurdle is the 38.5K Big Devil Slope Curve, which affects the traffic flow in the entire Alishan Mountain area. The second level is the 58.5K Ming Tunnel Project, which is the second place for running a red light. The third pass is a 60.2K steep slope curve improvement similar to the first pass; the fourth pass is a 70.1K open tunnel project, which affects the traffic flow above Shizhu. These checkpoints are controlled by one-way signals and there is no buffer lane in the middle. Some vehicles directly run the red light at night, causing a dilemma and immobility when going up and downhill.

Huang Yuanming emphasized that since these checkpoints often require waiting for several minutes and can easily cause slow-speed traffic jams, it is recommended that friends going up the mountain reserve at least 30 minutes of buffer time to avoid delaying their journey.