There are two of these on the bridge over the tracks, actually. Present issues for bikes as well.

Public Works - DA (Inspections)将个问题分配给City Hall – DR

Issue 2627800 has been marked as a duplicate of this issue.

Thank you for reporting this issue to the City of Cambridge. Unfortunately, the City is not responsible for addressing issues on state property, but we've shared this report with the Massachusetts Dept. of Conservation & Recreation (DCR) and asked them to address. Please contact DCR Community Relations at 617-626-4973 for direct follow-up about this.

Thanks for fixing this issue!