Boston Police tweet, provide no other details of the Sunday-night incident.

NECN reports the MBTA is going to use the Mattapan Line as a guinea pig for a collision-avoidance system that uses radio waves to detect other trolleys and begins to beep insistently if the trolley operator gets too close. If it works, the system could be deployed on the Green Line.

Charles Bandes, professional photographer, posts some photos of a couple who really, really like the Mattapan High-Speed Line:

... Liz and Dave wanted something different [for their engagement photos], and arranged for us to get access (and a photography permit) to the car-house at the Mattapan red line station. We were able to board the trolleys and wander the tracks, resulting in photos that are quite different from my usual engagement photos. ...

When her trolley at Ashmont yesterday pulled up lame and then the dispatchers wouldn't let the next trolley roll into the station for some time, Cowbark refused to grumble and foot-stomp like everybody else:

Me? I was happy reading my magazine, and then put it away for a bit to take some photos. You know this is significant because I was also standing in the freezing cold and I still wasn't complaining!

This just in from the T: The first ever air-conditioned Mattapan trolley rolls out of Ashmont station at 2 p.m. today. The other nine trolleys on the cutest transit line in all of Massachusetts will be retro-fitted with A/C by the end of the summer.

That big thunderstorm this morning pushed a tree branch through the windshield of a Mattapan trolley, injuring the driver and two passengers.

(Thanks to CharlieBlog for noticing this story on Channel 7's website.)

If somebody ever made a model-train layout of the Mattapan Line, one of the stops would look just like this.