"It's estimated that the average commuter in our region, congestion costs that person in excess of $1000 per year in lost time."

VOA: standard.2010.07.26

and then I work on Surfliner, which is a commuter train. It goes up down the coast.

还有我在Surfliner工作，是通勤火车。沿着海岸线走。

火车满载着幸福 - SpeakingMax英语口语达人

Telling the difference between a regular commuter and an attacker is difficult on camera or in person.

VOA: standard.2010.04.01

In 2003,a suicide bomber attacked a commuter train near the Russian republic of Chechnya,killing 44.

VOA: standard.2009.11.27