Also known as East-West Expressway, Bali-Xindian Line (Chinese: 東西向快速公路八里新店線; Hanyu Pinyin: Dōngxīxiàng Kuàisùgōnglù Bālǐ Xīndiàn Xiàn; Tongyong Pinyin: Dongsisiàng Kuàisùgonglù Balǐ Sindiàn Siàn), the route begins in Port of Taipei in Bali District and ends near the western end of Xiulang Bridge in Zhonghe District, linking many major population centers within New Taipei together, including Sanchong, Banqiao, and Zhonghe.

Beginning near the Port of Taipei in Bali District, the route proceeds southeast, crossing over PH 15 and CR 105.

The route emerges from the tunnel near Chengzilao of Wugu District, turning south along the west shore of the Erchong Flood Diversion Path (二重疏洪道).

PH 64 continues southeast along the Erchong Flood Diversion Path, and then crosses over the Dahan River while running parallel with the New Taipei Expressway on Chongcui Bridge as it exits Sanchong and enters Banqiao.

In the 1990s, as part of the expressway plans in Taiwan, the Special Route 1 corridor was selected to be upgraded to an expressway-grade Provincial Highway as PH 64.