Accessibility changes underfloor engineering
The monitoring study shows why a lower passenger floor also changes sensor packaging. The paper reports a planned installation, not fleet-wide fitment.
地方鐵路
E721 · Sendai · 仙台
The floor is lowered for regional platforms. On the airport-access 500 subseries, look for dedicated luggage space inside.
JR東日本
技術資料
| 公布最高速度E721 | 120 km/h |
|---|---|
| 技術E721 · 0 / 500 / 1000 | Lowered passenger floor |
M為動力車，T為無動力車。各項數值適用於註明的版本與資料日期。
技術資料
- E721系 · JR東日本 · — · 基本情報・車両紹介
解讀車輛設計
E721 low-floor design; monitoring adaptation is a specific development project.
| Platform interface | The low floor removes the internal entrance step at lower regional platforms. 1 |
|---|---|
| Door technology | JR East identifies pneumatic doors in its cold/snow-door development comparison. 2 |
| Monitoring clearance | Existing optical track monitors exceeded the low-floor vehicle installation envelope; layout and optical geometry were redesigned. 3 |
技術資料與頁碼
- JR東日本会社要覧2017–2018：車両
JR東日本 · 2017 · E721系 - 耐寒・耐雪電気式ドアの開発
JR東日本 · 2022 · 空気式・電気式ドア比較表 - 線路設備モニタリング装置の改良に関する研究開発
JR東日本・JR EAST Technical Review 62 · 2019 · §2.2、図3、pp.27–32
座位指南
- E721
- 長椅與橫排座椅
There are side-facing and transverse seats. If you have a suitcase, the 500 subseries built for Sendai Airport services also has luggage space.
啟用年份 · 2007
資料來源與更新
查核日期 2026-11-07