The new sidewalk cycle track on Concord Avenue near Fresh Pond is dangerous and uncomfortable to use.
It crosses numerous side streets and commercial driveways. Car drivers turning in or out don't expect bicycles on what looks like a sidewalk.
And at each driveway, the track dips down and then up again. All these bumps make for uncomfortable riding.
The previous configuration had perfectly usable bike lanes.
The older two-way track between the rotaries is even worse. It crosses even more driveways, and at each one, there's a granite curb which crosses the track diagonally and gives a big bump. There are also random poles and granite posts on the path.
To "solve" the safety issue at driveways, they painted crude stop signs on the pavement. That doesn't fix what's an inherently dangerous facility.
Please do not add cycle tracks to any more streets in Cambridge.