Windsor River Road/Windsor Road Intersection Improvement Project (Roundabout)

The Windsor River Road/Windsor Road Intersection Improvement Project will transform a signalized intersection to a roundabout, improving safety and efficiency for motorists, cyclists, and pedestrians. This project, which will be constructed in six stages, started August 23, 2021, and will be completed in about one year. For background information, please go here.

The hours of construction will be 7:30 AM – 5:30 PM, Monday-Friday, exclusive of holidays. For more information, call the Town of Windsor Public Works Department at (707) 838-5340.

Construction Updates

07/21/2022:  Central Island Feature of Roundabout Construction begins July 21

In Stage 6, workers completed the installation of a splitter island on the south and west side of the intersection. The Central Island work will consist of installation of concrete curbs and foundations, stamped concrete, and aesthetic stonework features.

The intersection will be open to traffic in all directions and will operate as a modified roundabout with STOP conditions. Please use caution and reduce speeds as construction workers will be working inside the barriers of the center circle. The pedestrian detour will remain the same. 

07/06/2022:  Stage 6 of Roundabout Construction Starts June 11

In Stage 5, workers will have completed excavation, grading, and paving of Windsor River Road east of Windsor Road, installation of a splitter island, storm drains, water service and sidewalk placement on the northeast corner of the intersection.

Stage 6a and 6b work will consist of installation of a splitter island on the south and west side of the intersection and is estimated to be completed by the end of July. This stage will be divided into Stage 6a and 6b to accommodate the necessary road closures for this work. Businesses will remain open and accessible. The pedestrian detour will remain the same but there will be additional vehicle detours. See below for detour and closure map.

Vehicle detours for Stage 6a consist of:

  • Southbound Windsor Road: West on Windsor River Road to south on Starr Road to east on Reiman Lane to Windsor Road
  • Northbound Windsor Road: West on Reiman Lane to north on Starr Road to Windsor River Road.

Vehicle detours or Stage 6b consist of:

  • Eastbound Windsor River Road:  South on Starr Road to east on Reiman Lane to north on Windsor Road to Windsor River Road
  • Westbound Windsor River Road: South on Windsor Road to west on Reiman Lane to north on Starr Road to Windsor River road.

05/26/2022:  Stage 5 of Roundabout Construction Starts June 6

In Stage 4, workers will have completed excavation, grading, paving, sidewalk and bus pad work on the southeast corner of the intersection.

Stage 5 work will consist of continued excavation, grading, and paving of Windsor River Road east of Windsor Road, installation of a splitter island, storm drains, water service and sidewalk placement on the northeast corner of the intersection. This stage of the project is estimated to take 6 weeks, weather permitting. To do this work, northbound Windsor Road south of Windsor River Road will remain closed. Windsor River Road will be closed in both directions between Windsor Road and Bill Beedie Way. The pedestrian detour will remain the same but there will be additional vehicle detours.

Detours: Vehicle detours consist of:

  • Northbound Windsor Road detour for eastbound Windsor River Road: East on Mitchell Lane to north on Conde Lane to Windsor River Road.
  • Northbound Windsor Road detour for westbound Windsor River Road: West on Reiman Lane to north on Starr Road to Windsor River Road.
  • Westbound Windsor River Road detour: North on Market Street to west on McClelland Drive to Windsor Road.
  • Eastbound Windsor River Road detour: North on Windsor Road to east on McClelland Drive to south on Market Street to Windsor River Road

See below or here for new map of the vehicle detours.

05/09/2022:  Stage 4 of Roundabout Construction Starts May 12

In Stage 3, workers will have completed excavation, grading, and paving of Windsor River Road, west of Windsor Road.

Stage 4 work will consist of excavation, grading, and paving of Windsor River Road, east of Windsor Road and sidewalk and bus pad work on the southeast corner of the intersection. This stage of the project is estimated to take 6 weeks, weather permitting. To do this work, we will need to temporarily close northbound Windsor Road south of Windsor River Road. The southbound lane of Windsor Road will be open to traffic. There will be new vehicle and pedestrian detours in this stage.

Detours: Vehicle detours consist of:

  • Northbound Windsor Road closed between Wall Street and Windsor River Road.
  • Northbound Windsor Road detour for eastbound Windsor River Road: East on Mitchell Lane to north on Conde Lane to Windsor River Road.
  • Northbound Windsor Road detour for westbound Windsor River Road: West on Reiman Lane to north on Starr Road to Windsor River Road.
  • Windsor River Road is open to through traffic, east/west.
  • Windsor Road is open to southbound traffic.

See below under the Stage 4 Summary for maps of the vehicle and pedestrian detours.

04/21/2022:  Stage 3 of Roundabout Construction Starts May 2

In Stage 2, workers completed demolition, removal, and installation of curb, gutter, sidewalk, and paving along the southwest corner of the intersection.

Stage 3 work will consist of excavation, grading, and paving of Windsor River Road, west of Windsor Road. This stage of the project is estimated to take 12 work days, weather permitting. To do this work, we will need to temporarily close Windsor River Road west of Windsor Road.

Stage 4 will immediately follow by opening up Windsor River Road and closing the northbound lane of Windsor Road at Windsor River Road. Southbound Windsor Road will be open to traffic.

Detours: There will be no changes in the pedestrian detour. Vehicle detours consist of:

  • Westbound traffic detour south on Windsor Rd to west on Reiman Lane then north on Starr Road.
  • Eastbound traffic detour south on Starr Road to east on Reiman Lane then north on Windsor Road.

See below for a map of the vehicle detours.

03/16/2022:  Stage 2 of Roundabout Construction Starts March 21

Stage 1 of the roundabout construction project’s 6-stage plan will be completed by March 18 and workers will reopen Windsor Road to northbound and southbound traffic. All lanes will be open! Please note, however, that Stage 2 work, which will begin on Monday, March 21, will involve some traffic control measures such as reduced lane widths.  

In Stage 1, workers installed new sidewalks, a median island, SMART rail panels, and asphalt pavement on Windsor Road north of Windsor River Road. Workers also installed new storm drainpipes after several utility relocations were completed. We also removed the old signal system and replaced it with a four-way flashing red light. Please note that the intersection of Windsor Road and Windsor River Road will be a 4-way stop for the remaining construction stages.

Stage 2 work will include the demolition, removal, and installation of curb, gutter, sidewalk, and paving along the southwest corner of the intersection. 

Detours: There will be designated detours to route pedestrians out of the work zone, including temporary asphalt paths and a temporary crossing of Windsor Road with pedestrian-activated flashing beacons. In addition, the public parking lot on the corner of Windsor River Road and Windsor Road will be closed to the public except on Saturdays so community members can access the food pantry. See below for a map of the pedestrian detours.

02/22/2022: You may not have seen much activity in recent weeks at the roundabout construction site, but we’re continuing to make progress. Construction work slowed about a month ago when we found old utility and telecommunications lines underground that weren’t clearly marked on any current maps or drawings. We had to figure out how to lower or relocate some gas lines to keep moving forward or redesign our proposed storm drain system. 

After much discussion between our roundabout design consultant and Public Works staff we believe we have a viable solution that will avoid the utility conflicts and get the project back on schedule. 

In addition, to help with traffic flow, the traffic signal lights at the intersection have been changed to a flashing red operation. We will continue to monitor traffic congestion, especially during school drop-off and pick-up hours.

01/06/2022: On Tuesday, January 11, Ghilotti plans to replace a storm drain manhole on Windsor River Road, west of Windsor Road which will require single lane traffic control with flaggers. Work will begin after 8:30a.m. when school is in session and should be completed within the day but may go through the school dismissal time.

During PG&E work last month, utility conflicts were discovered with Sonic cables. Sonic will be onsite Saturday, January 8 to relocate their facilities. All work will be within the barricaded construction area. Ghilotti will be back on the job on Monday, January 10 and expects to complete fire hydrant, storm drain, grading, remaining curb and gutter and other concrete work over the next three weeks.

12/14/2021: Flashing beacons have been installed at the temporary crosswalk east of the construction site on Windsor River Road to help pedestrians and cyclists cross safely. PG&E completed re-lowering its gas-service lines to accommodate the storm drain pipe and in the upcoming week, the contractor is scheduled to install the aggregate base for concrete as well as install curb, curb ramps and sidewalks. 

11/03/2021: Overnight construction work on November 4 - Comcast will relocate its overhead facilities at the roundabout site between 11 PM on Thursday, Nov. 4, and 6 AM on Friday, Nov. 5, to a new underground vault. This night work will minimize internet/CATV service disruption to the community as the company will take down coaxial and fiber circuits. 

10/19/2021: Current construction site activity consists of utility relocation of facilities by Comcast, AT&T, and PG&E. There has been a delay in storm drain pipe material shipments so underground work is expected to resume at the end of the week. Ghilotti Construction is preparing the site for rain/storm events and all work is weather permitting. Pedestrian activated flashing beacons are on order and is expected in to be installed at the temporary cross walks on Windsor River Road in three weeks. Until that time, Ghilotti Construction is providing flaggers at the temporary crosswalks, Monday through Friday, during peak school traffic hours in the morning and afternoon.

09/23/2021: The Windsor River Road and Windsor Road roundabout construction project is on track and current upcoming work in the next few weeks include excavating and subgrading the roadway, installing electric conduits, irrigation chases, and railroad conduits, and removing storm drains. 

 Also, as many of you know, concrete barricades and temporary vehicle and pedestrian detours – including two pedestrian crosswalks east and west of Windsor Road – are in place. Please follow these detours to help keep everyone safe.

08/24/2021: The contractor will place the traffic signal in red flash (all-way stop) at 10 AM for several hours on Wednesday and Thursday, August 25-26, for temporary striping modifications and placement of K-rail barriers.

08/19/2021: The contractor will start setting up and prepping the construction site on Monday, August 23, so the traffic detours will not go into effect until Wednesday morning, August 25. We will monitor traffic control and modify as necessary throughout the project. 

Stage 6a and 6b Summary

  • 6a - Installation of splitter island on Windsor Road, south of Windsor River Road
  • 6b - Installation of splitter island on Windsor River Road, west of Windsor Road

Road Traffic Detour Maps Stage 6A_6B at Windsor River Road and Windsor Road

Stage 5 Summary

  • Installation of splitter island on Windsor River Road, east of Windsor Road
  • Storm drain, water service and sidewalk installations on northeast corner of the intersection
  • New bus bad on north side of Windsor River Road

Road Traffic Detour Map for Stage 5 of Roundabout Construction

Stage 4 Summary

  • Excavation, grading, and paving of Windsor River Road, east of Windsor Road
  • Sidewalk and bus pad work on the southeast corner of the intersection

Road Traffic Maps Notification - Stage 4 - JPEG

Ped Path Notification_ Stage 4 - JPEG

Stage 3 Summary

  • Excavation, grading, and paving of Windsor River Road, west of Windsor Road

Updated Road Traffic Maps Notification Stage 3

Stage 2 Summary

  • Demolition, removal, and installation of curb, gutter, sidewalk, and paving along the southwest corner of the intersection.

Stage 2 Pedestrian Detour Map

Stage I Summary

  • Set up staging area for storing supplies and equipment on the vacant lot that is located on the southwest corner of the intersection.  
  • Set up barricades and detours to allow the closure of Windsor Rd from Windsor River Rd to the south entrance of Marshall Way.
  • Demolition of existing curb, gutter, sidewalk, and pavement in the work zone.
  • Construction of new improvements in this work zone that will align with the northerly leg of the proposed Roundabout.

Updated Road Traffic Maps Notification_Revised 8.11.21

Project Benefits

The Roundabout Project will improve vehicular, bicycle, and pedestrian circulation at the Windsor River Road (WRR) and Windsor Road (WR) intersection by replacing the existing signalized intersection with a roundabout and completing a segment of a multi‐use pathway.

Pedestrian crossing safety improvements include new sidewalks, realigned crosswalks, ADA curb ramps, and refuge medians. The project also includes a 760 linear‐foot segment of the Class I SMART multi‐use path alongside the rail line.

Construction Detours

Stage 1 of the construction project will include all improvements between WRR north to Marshall Way. WRR will be closed to vehicular traffic north and south between Marshall Way and WRR. Pedestrian access to businesses along this stretch will be maintained. Pedestrian access through the intersection will be maintained however temporary crosswalks will be used to get them safely through the work area.

All other segments of the intersection will remain open during Stage 1. Vehicles will be able to travel east and west on WRR. Vehicles will also be able to go south on WR. North bound vehicles on WR will have to make a right or left turn at WRR.

If you plan on using this intersection during construction, please allow yourself more time to get to your destination in case of delays. As always, please watch for pedestrians, bicycles, and workers in the area and obey all the traffic control signs.