LOCAL

Metrolink collison avoidance system

Rick Loomis / Los Angeles Times

Hutch Topikian, a road foreman for Metrolink, climbs down from the first Metrolink train to be equipped with a positive train control system, which will eventually be standard on every Metrolink train. The collision avoidance system is designed to prevent tragic accidents like the incident in Chatsworth that killed 25 people in 2008.

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