US 51 (W State Street to WSOR Bridge)

Janesville, Rock County

Schedule

Construction begins: July 13, 2026

Anticipated completion: late fall 2026

 

Traffic impacts

Traffic on US 51 will be maintained in stages:

  • Stage 1: One lane of traffic in each direction will be maintained on the outside lanes while work occurs on the inside lanes.
  • Stage 2: Traffic will then shift to the inside lanes while work is completed on the outside lanes.

Additional impacts include:

  • No left turns from Delavan Drive during construction
  • Short-term closures and flagging operations at times
  • Access to local properties will be maintained whenever possible
  • Temporary interruptions to driveways or sidewalks may occur during active work; advance notice will be provided when access is affected

 

Weekly update

Current Construction Operations:

  • Traffic was switched to the outside lanes to complete work on the inside lanes
  • Guardrail was installed on the NB side
  • Median Curb and Sidewalk form and pour concrete.

Upcoming Construction Operations:

  • Crews will finish pouring the concrete for the curb and sidewalk in the median.
  • Milling and Asphalt paving anticipated for late this week on the median lanes.

Traffic Updates:

  • USH 51 Traffic –
    • The NB and SB lanes are on the outside lanes in a single lane each direction.
    • One lane in each direction will remain open on Center Ave.
    • The intersection of Center Avenue and Delavan Drive will remain as a signalized intersection.  All movements will be allowed through the intersection except to and from the west leg of W. Delavan Dr.
  • Delavan Drive –
    • The west leg of the intersection will remain closed to all traffic during construction.