Known as "the second freeway," National Highway No. 3 had a 17-year history before completion. With a north-south axis, its main branch starts at Keelung and ends at Linpien in Pingtung for a total length of 518 kilometers. All told it cost NT $ 458 billion, making it the largest public works project in Taiwan over the last several decades.
俗稱「二高」的國道三號，歷時近十七年終於興建完工，這條南北向的交通要道，主線北起基隆、南至屏東林邊，全長五百一十八公里，建造經費高達四千五百八十億元，為國內近數十年最大規模的公共工程。