title: National Freeway 4
text: # National Freeway 4
  
  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.
  
  ## Length
  
  The total length is 28.0 km (17.4 miles).
  
  ## Major cities along the route
  
  * Taichung City
  
  ## Exit List
  
  | County | Location | km | mi | Exit | Name | Destinations | Notes |
  | - | - | - | - | - | - | - | - |
  | Taichung City | Qingshui | 0.0 | 0.0 | 0 | Qingshui | Prov 17 / Prov 1 – Qingshui, Port of Taichung | |
  | Taichung City | Qingshui | 2.3 | 1.4 | 2 | Zhonggang System | Nat 3 – Shalu, Dajia | |
  | Taichung City | Shengang | 9.0 | 5.6 | 9 | Shengang | Sanmin Rd. – Shengang, Cty 132 – Houli | |
  | Taichung City | Shengang | 11.7 | 7.3 | 11 | Taichung System | Nat 1 – Houli, Taichung | |
  | Taichung City | Houli | 14 | 8.7 | 14 | Houfeng | Prov 13 – Houli, Fengyuan | |
  | Taichung City | Fengyuan | 17.8 | 11.1 | 18 | Fengshi | Prov 3 – Fengyuan, Shigang, Dongshi | |
  | Taichung City | Tanzi | 26.0 | 16.2 | 26 | Tanzi | Fugui Road/Fengxing Road/Fengyuan Blvd. | |
  | Taichung City | Tanzi | 28.0 | 17.4 | 28 | Tanzi System | Prov 74 – Tanzi, Taiping, Dali | Terminus of freeway |
  | 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||||
  
  ## Lanes
  
  The lanes in each direction are listed below.
  
  * 3 lanes:
     * Qingshui Top - Fengshi IC
  * 2 lanes:
     * Fengshi IC-Tanzi System
  