Because otherwise signal problems on the Red Line at Park Street and a disabled trolley on the Green Line at Government Center might mean trouble. Phew. Oh, wait.

Fess up. The riders, however, realize this is Monday.

Also, South Shore commuter lines are on 10-15 minute delays due to what the T describes as "a track problem."

Carl Stevens of WBZ rides along with some undercover T cops on the Green Line, including one who probably needs to grow a mustache now or something:

Red Line, Green Line both having problems, the Twittersphere reports: People sitting in trains that aren't moving or jamming stations waiting for trains that aren't coming. Green Line especially fun: Switching problems at Kenmore at rush hour on a Red Sox game night.

At first glance, this just seems like a boring photo of the entrance to the Park Street T stop. But look more closely, at the gate on the left side. Michael Femia took the photo on June 10.

In the rest of the world, trains run with just one driver. And by "rest of the world," be sure to include East Boston and Revere.

The Carmen's Union, of course, raises the specter of national security, in "a post-9/11 world."

Who says 140 characters is limiting? Poetic Mindset tweets about the B line:

B line train torments/are decisions pulled from hat/come back express train.

Oodja quickly followed up with this:

B-Line is wretched / there is no disputation / but the E is worst

Phil R. didn't want the D line to feel left out:

The D line stands by / so-called "schedule adjustment" / now packed like sardines

C line, anyone?

As evidenced this morning by Car # 3820, which has completely been retrofitted with the new coverings. They are identical in style to those awful coverings being applied to the Orange Line cars - that off grayish blue color with the multi-color 'squiggle' lines.

Sorry no pics - my cell phone doesn't have a camera.

But now we know why Uncle Danny doesn't have the money to invest in decent signals for the Green Line. He's apparently wasting it on upholstery instead.

Rick describes the guy with the green stool who got on the other night at Kenmore and sat on it:

... Once the train pulled out of the station Jon began to sing, entertaining those around him and enticing them to sing with him. The first song, "ride it" by the Quad City DJs, was a natural choice since we were all on a train.

By Hynes Convention Center, Jon was leading the crowd in "Rapper's Delight" prompting two girls from West Virginia to offer to take him back to WV with them. ...

As the new Arlington station opens on its first weekday, the Green Line is all bollixed up due to some sort of signal problem at Copley AND a broken train at Government Center. The riders are restless; something about spending 20 or 25 minutes sitting in a tunnel will do that to you - especially if it all adds up to a 50-minute ride from Kenmore to Copley - or a 40 minute ride between St. Mary's and Kenmore with "no air conditioning, no seat, no explanation." The lucky ones brought reading material.