Thank you for reporting. We've shared this with the Police Dept.

It is legal to ride a bicycle on the sidewalk anywhere in Cambridge outside of these business districts:

* Central Square Business District
* Harvard Square Business District
* Huron Village
* Inman Square
* Massachusetts Ave - Russell Street - Wendell Street

Cars speed across the bridge constantly and the bike lanes of the bridge are unsafe. Nothing will ever be done about any of this since it is under state jurisdiction.

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