Pioneer Widening and Discovery Drive Roundabout
The City's Pioneer Widening and Discovery Drive Roundabout project will widen Pioneer Street, construct a new roundabout at Discovery Drive, and build N Discovery Drive to a new portion of Pioneer Canyon Drive.
When completed, there will be a four-lane roadway along Pioneer Street from just west of Royle Road to I-5, and a new east-west collector roadway (Pioneer Canyon Drive) connecting N Discovery Drive to an extension of 56th Place. This will provide two parallel routes to handle current and future traffic in the area.
Traffic between Interstate 5 and Royle Road is expected to increase as new commercial development planned in the area is constructed and opened. While addressing the necessary improvements for traffic capacity and flow, the City has an opportunity to design the area to be more pedestrian and cyclist friendly.
PROJECT STATUS
(updated November 18)
Here’s what to expect on Pioneer Street this week (Nov. 18-22) between Royle Road and 56th Place:
- Daytime flagging, expect delays up to five minutes. Plan ahead or use alternate route. Flagging limited during peak hours, 7 AM-8 AM and 4:30 PM-5:30 PM.
- Daytime closure of Discovery Drive. Local business access to Costco, Mountain View Dental or Ridgefield Physcial therapy via 56th Place roundabout for those traveling from west Ridgefield.
Please remember that the speed limit on Pioneer between Royle and 56th is 25 mph, at all times, not just during construction hours.
Over the next couple weeks, the contractor will install structural earth walls on the south sides of Culverts 1 and 3. Traffic impacts during this work will include flagging on Pioneer Street to allow haul trucks to transport materials in and out of the work zone and daytime closures of Discovery Drive to allow for equipment staging. Expect delays, under 5 minutes, during flagging. The contractor will continue to monitor backups and minimize impacts on the surrounding roundabouts.
As they wrap up installation of walls at Culvert 3, the contractor will start bringing in material to widen the road south of Pioneer and prepare to shift traffic onto the south side of the road.
If you are traveling eastbound on Pioneer to visit businesses such as Ridgefield Physical Therapy, Mountain View Dental, or Costco during weekdays when Discovery Drive is closed, you can access these locations by continuing to 56th Place and turning north (left) at the roundabout, or by making a U-turn at the roundabout and turning right onto 53rd Place.
Thank you for your continued support and patience throughout this project.
- The speed limit on Pioneer Street from Royle Road to 56th Place is 25 mph, as this area is a designated work zone. This speed limit is in effect 24/7, not just when construction activities are occurring.
- Discovery Drive is open to vehicle traffic but may have daytime closures. The contractor will complete the roadway improvements in early 2025. The roundabout is part of Phase 4, scheduled to start in 2025. The speed limit is 25 mph.
- The temporary signal at 53rd Place has been removed and the intersection converted to right-in/right-out access. Candlestick style traffic barricades are installed along the center line to emphasize that no left turns are permitted at this intersection.
- Traffic on Pioneer Street, from approximately 47th Place to 50th Place, is shifted north onto a temporary bypass road. This adjustment will remain in place for a few more weeks, and return to normal alignment by the end of the year.
View and Sign Up for Traffic Alerts
Phase 1: N Discovery Drive and Pioneer Canyon Drive west segment |
October 4, 2024 - COMPLETE. |
Phase 2: N 53rd Place and Pioneer Street Intersection |
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Phase 3: Pioneer Widening, 53rd to 56th Place |
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Phase 4: Discovery Drive Roundabout and Pioneer Widening, Royle to 53rd Place |
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Phase 5: Pioneer Canyon Drive, west leg |
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City Project
| Pioneer Street | This project will widen Pioneer Street to a four-lane section from Rosauers to the 56th Place roundabout. The new segment of Pioneer will include two travel lanes and a shared use path, separated from vehicles by a planter strip, in either direction. |
| Roundabout | A new roundabout will be constructed at Discovery Drive. |
| 50th Place | N Discovery Drive will be built to connect to a new east-west parallel route, Pioneer Canyon Drive, being built by the developer of Union Ridge Town Center/Costco. This segment of Pioneer Canyon Drive will connect Discovery Drive to N 56th Place, which was built by the Union Ridge Town Center and Costco developer. |
| Pioneer Canyon Drive | The City project will include a short western leg of Pioneer Canyon Drive at Discovery Drive, to provide access to the new Ridgefield YMCA. |
Developer Projects
The construction of N 56th Place, N 53rd Place and the eastern leg of Pioneer Canyon Drive was completed by the developer of Union Ridge Town Center. The developer's project included the construction of a new roundabout at N 56th Place and Pioneer Canyon Drive.
The developer of Ridgefield Gateway will be adding a turn lane and other improvements to the north side (westbound direction) of Pioneer Street between I-5 and 56th Place.
The developer will also construct modifications to the Pioneer Street and Interstate 5 interchange that will create additional lane capacity.
Project Strip Map
Coordination
The City's Pioneer Widening and Discovery Drive Roundabout project is just one piece of of a group of transportation infrastructure improvements planned for the area. Several projects will be completed by private developers, paying for the increased infrastructure needs their projects will create.
The map below shows all of the projects, color coded by whether the project will be done by the City, or by a Developer. This is a conceptual map and does not show exact road alignments.
| Project | Years of Construction | |
|---|---|---|
| 1 | Widen Pioneer Street from 56th Place to Royle Road. Construct new roundabout at Discovery Drive | 2024 |
| 2 | Build the South 10/11th Street Corridor and I-5 Overpass | 2028 |
| 3 | Widen Royle Road to minor arterial (3 lanes) | 2024/2025 |
| 4 | Build Pioneer Canyon Drive as industrial/commercial collector | 2024 |
| 5 | Build N Discovery Drive as industrial/commercial collector | 2024/2025 |
| 6 | Build N 56th Place as industrial/commercial collector | 2024 |
| 7 | Build S Discovery Drive as minor arterial | 2024 |
| 8 | Build new east-west collector south of Pioneer | 2024/2025 |
| 9 | Build new north-south connector east of I-5 | 2024/2025 |
| 10 | Build new regional stormwater facility at I-5 Junction | 2024 |
The City’s Pioneer Widening and Discovery Drive Roundabout project team has been closely working with the teams for Union Ridge Town Center/Costco, Mountainview Dental, and Ridgefield Gateway to ensure all utilities and road improvements are coordinated both in design and in timing.
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Submit a Comment of Question to the project team.
