[2] It bypasses the rural district of Pinglin, which used to receive high traffic prior to the completion of the tunnel.

[4][5] Tunnel construction used 370,000 m3 (13,000,000 cu ft) of concrete, 2,000 kilometers (1,200 mi) of cables, and 2,000 lighting units.

[5] While excavating the tunnel, engineers encountered difficult geological problems such as fractured rock and massive inflows of water, which caused severe delays.

Along the tunnel alignment, there are six major faults, ninety-eight fracture zones, and thirty six high-pressure groundwater sources.

Automated road-rule enforcement cameras are used to monitor speeders, tailgaters, and those who unlawfully change lanes.