Here's a summary from Streetsblog. A key piece of this that didn't come out of the meeting at city hall was the part about the MBTA wanting to potentially work with the city on new strategies due to the city's willingness to make changes. Early Data Show Less Traffic, More Bus Riders On Broadway In Somerville
https://mass.streetsblog.org/2019/12/10/early-data-shows-less-traffic-more-bus-riders-on-somervilles-new-bus-lanes/
A copy of Brad Rawson's slides is available here: https://www.slideshare.net/mem_somerville/2019-12-09-winter-hill-in-motion-public-hearing