noun
regional express train
A limited express train that operates within a specific region or section, often with fewer stops than a regular express but not as fast as a full limited express.
この区間特急は、県内の主要駅だけに停車します。
This regional express stops only at major stations within the prefecture.
区間特急を利用すれば、普通列車より30分早く着きます。
If you take the regional express, you'll arrive 30 minutes earlier than by local train.
Compound of 区間 (section, zone) and 特急 (limited express), literally 'section limited express'.