The scope of the project, which from Hualian Station on Eastern Trunk line to Zhiben Station of South-link line, total in length of 162.5 km (Curve cut-off). After excluding the 49.85 km of the dual-track engineering section of the bottleneck section that has been completed, the actual single-track route requires the dual-track engineering to be approximately 112.65 km in length.
　　The goal of this project is to build a new track right next to the original track, aim to fulfill the goal of whole line Double-track system.
　　The Construction item, including station and minimum railway curve radius improvement, Embankment/ Cut engineering, Bridge and culvert engineering, Hualien Machinery and railway depot Improvement, Drainage, Mechatronic systems works.

　　The project is aim to conduct the environmental impact assessments of Double-track Railway Electrification Project in Hualian and Taitung region