The City of Bay City Street Department is responsible for maintaining about 450 lane miles of roadway within the city limits, equaling about the same distance from Bay City to Sault Sainte Marie and back.

The department handles a wide variety of tasks, including crack sealing, spray patching, cold patching, chip sealing, large pavement repairs and road reconstruction, utility cuts, street sweeping, snow and ice removal, traffic signs (informational and regulatory), pavement markings and striping, temporary sidewalk repairs (trip hazards reported through Construction Services) and traffic control (barricades/detours).