I commuted on the #1 bus line from Boston to Cambridge before the pandemic. There's no way that you lose 1 lane in for both directions and not mess up the bus. A bus lane on half the bridge is just going to be filled with the cars turning at Memorial. And definitely at Beacon Street.
Just make a bus lane in each direction next to the bike lane. You get more space between cars and bikes and bus drivers are licensed and professional. Better than the jerks driving 40 mph on the bridge to get stuck at the next light.
Just make a bus lane in each direction next to the bike lane. You get more space between cars and bikes and bus drivers are licensed and professional. Better than the jerks driving 40 mph on the bridge to get stuck at the next light.