A few, short blocks later, the line of M-3172's turns right once more, onto Lexington Avenue, where, it parallels the elevated BART tracks. In this shot, you can see a short slack-span, as Lexington makes a dog-leg. Note that there are 3 disks one each dead-end. The view of this line is especially great, when seen from the speeding train on the left. But, if you want a pic, act fast, as those trains are really movin'!