Note that this illegal issue, which poses safety issue to cyclists and causes more angst/idling/emissions from motorists who are jammed up, was reported simultaneously to the CPD dispatcher, as you likely will respond. I would be very interested what citation(s) are issued, given that this is a repeat offender, location and notification by a concerned citizen.

More context

Thank you for notifying of this. In addition to responding (if there is an available officer), our Traffic Enforcement Unit will contact the management of the bus companies to alert them of this concerning and potentially dangerous activity.

Lastly, so you're familiar, https://data.cambridgema.gov/Traffic-Parking-and-Transportation/Cambridge-Parking-Tickets-for-the-period-January-2/vnxa-cuyr has a listing of all the citations (where and when) that have been issued for all parking violations, including parking in bicycle lanes.

Previously acknowledged.