National freeway 4 is a freeway that begins in Qingshui District, Taichung at Provincial Highway 17 and ends in Tanzi District at Provincial Highway 74.

The total length is 28.0 km (17.4 miles).

The lanes in each direction are listed below.

The Fengshi - Tanzi section was opened on 16 January 2023.

This Taiwanese road or road transport-related article is a stub.