Also please delineate the bike lane in the rotary starting at Brookline Street. I don't think drivers realize that the BU bridge is one lane wide until they have past the traffic light.

I can certainly understand how frustrating and dangerous this situation is. Unfortunately, this section of roadway is not under the jurisdiction of the City of Cambridge. The bridge and rotary are controlled and maintained by the Department of Conservation and Recreation. I will forward your concerns on to DCR, but please feel free to also contact them directly at mass.parks@state.ma.us.

Thanks for fixing this issue!