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 October 24)
As progress continues on the Pioneer Widening and Discovery Drive Project, several new traffic changes will affect drivers in the area.
- PIONEER CLOSURE – 7PM Friday, October 25 to 6 AM Tuesday, October 29: Pioneer Street will be CLOSED between Discovery Drive and just west of 53rd Place from 7 PM Friday, October 25 to 6 AM Tuesday, October 29. During this period, city contractors will install a major stream culvert. The same detour route along S Royle Road, Wells Drive, Timm Road, S 6th Way, and S 56th Place will apply. Discovery Drive will remain open for local business access. Detour map (PDF)
- PIONEER CLOSURE – 7PM Friday, November 1 to 6 AM Monday, November 5: Pioneer Street will be CLOSED between Discovery Drive and just west of 53rd Place from 7 PM Friday, November 1 to 6 AM Tuesday, November 5. During this period, city contractors will install a major stream culvert. The same detour route along S Royle Road, Wells Drive, Timm Road, S 6th Way, and S 56th Place will apply. Discovery Drive will remain open for local business access. Detour map (PDF)
- For Your Safety:
- The speed limit on Pioneer Street from Royle Road to 56th Place is 25 mph, as this area is a designated work zone.
- Intermittent flagging is ongoing in the project area, on both Pioneer Street and Discovery Drive. Please be aware and ready to follow the instructions of flaggers.
- When using the detour, please drive carefully, adhere to posted speed limits, and watch for pedestrians and cyclists.
- Discovery Drive is open to vehicle traffic. The contractor will complete the roadway improvements in early 2025. The roundabout is part of Phase 4, scheduled to start in early 2025. The speed limit is 25 mph. Drivers are encouraged to use caution to ensure safety, since this is a new route. Intermittent day time road closures may take place on Discovery Drive between Pioneer Street and Pioneer Canyon Drive. Please follow the direction of traffic flaggers. The contractor is limiting closures as much as possible to the least disruptive times.
- The temporary traffic signal at 53rd Place and Pioneer Street will remain until the Phase 1 connection (N Discovery Drive and Pioneer Canyon Drive) is open AND the contractor completes the Phase 2 work at 53rd Place and Pioneer Street. After that, the 53rd and Pioneer intersection will become a permanent right-in/right-out intersection with no left turns.
- 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 months. During this time, crews will work on the south half of the culvert and complete street improvements for that section.
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.
