Overview
Officially the road is designated as National Route 271. The entire road is built to a standard similar to that of an urban expressway and is classified as a road for motor vehicles only (自動車専用道路, Jidōsha Senyō Dōro?) (motor vehicles must have a displacement of at least 125 cc).
The road connects western Kanagawa Prefecture (including the popular onsen resort town of Hakone) with Tokyo through the Tōmei Expressway. The route parallels Route 1 until Ōiso, where it then follows a northeasterly route through Hiratsuka and Isehara before terminating in Atsugi.
The road was opened in 1969 with 2 lanes. Expansion to 4 lanes was completed in 1978.
For toll collection purposes the road is divided into an Odawara section and an Atsugi section, with Ōiso Interchange as the dividing point. The toll for a normal passenger car to use one section is 350 yen.
Read more about this topic: Odawara-Atsugi Road