As commuters faced more delays on Tuesday, more problems have come to light. 

Transportation officials discussed other Red Line issues Monday night.

The Red Line has a back log of 1.5 billion in upgrades and replacements, as ridership has grown almost 15 percent in eight years, outpacing other lines. 

Last year from July to November, trains ran on time less than 75 percent of the time. 

The Red Line suffered severe delays on Monday due to weekend work on the Longfellow Bridge. 

There are speed restrictions in place due to the on-going work. 

The MBTA General Manager said the tracks need at least 48 hours to settle after work. 

On Monday, the MBTA released this statement: 

Due to a speed restriction as a result of Longfellow Bridge track work performed on January 23 and 24, the Red Line is experiencing severe delays in service. This speed restriction is anticipated to be cleared in two to three days with regular Red Line service resuming at that time.

The MBTA posted a message on Twitter Monday afternoon that more delays are expected on Tuesday. 

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