 | ||||
|---|---|---|---|---|
| 国道166号 | ||||
 | ||||
 | ||||
| Route information | ||||
| Length | 125.4 km[1] (77.9 mi) | |||
| Existed | 18 May 1953–present | |||
| Major junctions | ||||
| West end |  National Route 170 in Habikino, Osaka | |||
| East end |  National Route 23 in Matsusaka, Mie | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
| ||||
National Route 166 is a national highway of Japan connecting Habikino, Osaka and Matsusaka, Mie in Japan, with a total length of 125.4 km (77.92 mi).
- ^ "一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.