On nice spring days and afternoons Arlington seems to post police officers on the Minuteman at the Lake St. and - less commonly - at the Mill St. crossings to educate cyclists that they don't have the right of way and can't just blast out into the crossing at 15MPH and expect cars to stop for them. In the past there were even a couple of pursuits/arrests (ha!)
https://www.bostonglobe.com/metro/20...brL/story.html
https://arlington.wickedlocal.com/ne...l-traffic-laws
That's a 'regular thing'. As far as pulling over cyclists, like @
rholland1951 said, it's probabl just a fluke - but sure, you can get a ticket for doing something very stupid on your bike. I've read that Cambridge police do frequent stings, pulling over cyclists who run red lights, but have not seen this myself.
As far as riding, I was able to get out for a rare-for-me midday ride this week, just a few miles on 225/Monument St./Virginia Rd. Riding in Lexington was extremely unnerving, with heavy, impatient traffic on roads which are typically empty on weekend mornings. Probably had something to do with avoiding a massive backup on 95 north due to a crash. It quieted down around Bedford and then it was smooth sailing all the way through. Monument St. felt amazing at that time of day, like being somewhere up north in NH/VT, with unmistakable signs of fall being around the corner. I counted more cyclists (not commuters) than expected at this time of day, I think the final number was 8.