Provincial Highway 63 (Chinese: 台63線) is a limited-access highway, which begins in Taichung at the intersection of Guoguang Road (Provincial Highway No. 3) and Zhongming South Road and ends in Caotun, Nantou on Bixing Road (Provincial Road 14B). It is commonly known as Zhongtou (Taichung-Nantou) Highway.

Quick Facts Route information, Length ...

Provincial Highway 63
台63線
Zhongtou Highway (中投公路)
Route information
Maintained by Directorate General of Highways
Length	19.023 km[1] (11.820 mi)
Existed	1 January 1998–present
Major junctions
North end	Prov 3 in South District, Taichung
Major intersections	Nat 3 in Wufeng
East end	Prov 14b in Caotun, Nantou
Location
Country	Taiwan
Highway system
Highway system in Taiwan
← Prov 62 → Prov 64

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The total length of the highway is 19.023 km. However, the viaduct actually begins at 1.8 km (on Wuquan South Road).

• Taichung
• Caotun, Nantou

• None. However, it crosses National Highway No. 3 near Zhongtou IC. in Wufeng, Taichung. To access National Highway No. 3, one must navigate surface streets for two or three minutes to get onto a northbound or southbound ramp for the highway.

There is a spur (No. 63A) connecting to Bo-ai Road (Provincial Highway No. 14) in downtown Caotun, Nantou. The length of the spur is 2.193 km.

• Highway system in Taiwan

Completed on January 1, 1998.

This highway is no longer classified as an expressway on July 1, 2006.^{[citation needed]} Despite this lack of designation, it still functions as one.