How many F40s and where do they most often run?

[Sengab]

I went to Boston two weeks ago to photograph the MBTA F40PH-2Cs for the first time. I decided to shoot in the area of North Station to guarantee myself some shots. I arrived at 7am and shot until 11am. During that time I shot the following. I am sure 1 or 2 went by that I did not shoot.
12 F40PH-2C
9 GP40MC
6 HSP46
1 MassDOT F40PH-2C