The MBTA is taking steps to avoid massive service disruption like we saw last week on the Green Line.

WGBH Radio has learned the Ts Power Department now has a crew dedicated solely to testing DC cables throughout the system. 

Last week a smoldering cable led to a three hour shutdown of the Green Line.

In the past, the T performed sporadic tests. Now it plans to systematically test entire power sections, focusing on a different section of the system each night when the T is not running.