| Country: | JPN |
| Type: | National |
| Route: | 271 |
| Odawara-Atsugi Road | |
| Map Custom: | yes |
| Length Km: | 33.1 |
| Length Round: | 1 |
| Established: | 1969[1] |
| Terminus A: | Odawara-nishi Interchange in Odawara, Kanagawa Seishō Bypass |
| Cities: | Hiratsuka, Isehara |
| Terminus B: | Atsugi Interchange in Atsugi, Kanagawa |
| Previous Type: | Route |
| Previous Route: | 270 |
| Next Type: | Route |
| Next Route: | 272 |
The is a 4-laned toll road in Kanagawa Prefecture, Japan. It is owned and managed by Central Nippon Expressway Company.
Officially the road is designated as National Route 271[2] as well as E85 under their "Expressway Numbering System."[3] The entire road is built to a standard similar to that of an urban expressway and is classified as a road for (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.[4]
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.[5]
right|thumb|Odawara-higashi Interchange with Mount Fuji in the background
| Name | Connections | Dist. from Origin | Notes | Speed Limit | Location (all in Kanagawa) |
|---|---|---|---|---|---|
| Odawara-nishi IC | Seishō Bypass | 0.0 | 60 km/h | Odawara | |
| Ogikubo IC | 1.8 | Odawara-bound exit, Atsugi-bound entrance only | |||
| Odawara-higashi IC | National Route 255 | 6.7 | |||
| Odawara Toll Plaza/ PA | ↓ | PA: Odawara-bound only | |||
| Ninomiya IC | 13.7 | Ninomiya | |||
| Ōiso IC/ PA | 17.2 | PA: Atsugi-bound only | Ōiso | ||
| 80 km/h | |||||
| Hiratsuka Toll Gate | ↓ | Hiratsuka | |||
| Hiratsuka IC/ PA | Pref. Route 62 (Hiratsuka Hadano Route) | 23.2 | PA: Odawara-bound only | ||
| Isehara IC | Pref. Route 44 (Isehara Fujisawa Route) | 26.8 | Atsugi-bound exit, Odawara-bound entrance only | Isehara | |
| Atsugi-nishi IC | Pref. Route 604 (Aikō Ishida Teishajō Sakai Route) | 30.8 | Atsugi | ||
| 60 km/h | |||||
| Atsugi IC | Tōmei Expressway National Route 129 | 33.1 | Route 129 inaccessible from Odawara | ||