WHY IS MAINTENANCE NEEDED ON THESE RAMPS?
The on-ramp bridges need to be reinforced where the beams connect to meet current requirements. This work will maintain the on-ramps’ long-term safety so they can continue serving thousands of travelers a day. Reinforcing the beam connections will increase the weight capacity of the bridges, which are vital components of these on-ramps.
This spring, we will begin maintenance on the SW Terwilliger Boulevard and SW Bertha Boulevard on-ramps to I-5 north. We are improving the weight capacity of the bridges by reinforcing beam connections. This will maintain the long-term safety and use of these heavily traveled on-ramps.
Work will include drilling and installing steel rods. Work is expected to be complete in summer of 2020, but is subject to change based on weather or unexpected site conditions.
TRAFFIC IMPACTS
The SW Terwilliger Boulevard and SW Bertha Boulevard on-ramps to I-5 north will close intermittently for up to one month each. The ramp closures are needed to maintain a safe work zone for travelers and construction crews. Traffic delays are expected. Intermittent single lane closures will occur on SW Barbur Boulevard and intermittent nighttime single lane closures will occur on SW Terwilliger Boulevard.
- Ramp closures may occur at all hours except from 5 a.m. to 10 a.m. weekdays.
- Only one on-ramp will close at a time.
- Signed detours will be in place.
TRAIL IMPACTS
To maintain safety to trail users, a short section of SW Trail 4 will close underneath the SW Terwilliger Boulevard and SW Bertha Boulevard on-ramps throughout construction.
- A signed detour will be in place on the trail to allow walkers to continue trail use.
- The trail detour is expected to last through summer 2020.
DETOUR ROUTES
SW Bertha Boulevard On-ramp to I-5 North Detour Route:
- Travel south on SW Barbur Boulevard.
- Turn left on SW 19th Avenue.
- Turn right on SW Spring Garden St.
- Turn left on SW 20th Avenue to access the on-ramp to I-5 north.
Trucks will continue south on SW Barbur Boulevard and then to SW 64thAvenue to access the on-ramp to I-5 north.
 
SW Terwilliger Boulevard On-ramp To I-5 North Detour Route:
- Travel north on SW Terwilliger Boulevard.
- Turn left on SW Barbur Boulevard.
- Turn left at SW Bertha Boulevard to access the on-ramp to I-5 north.
SW Trail 4 Detour Route (follow temporary detour signs during construction):
Westbound Trail Users:
- Turn right at SW Custer Street onto SW Briar Place.
- Turn left on SW Miles Street and follow trail detour signs to SW Barbur Boulevard.
- Turn left on SW Terwilliger Boulevard to reconnect to the trail.
Eastbound Trail Users:
- Take stairs to access SW Terwilliger Boulevard at SW Candy Street/SW 4th Avenue.
- Continue on SW Terwilliger Boulevard to SW Barbur Boulevard.
- Turn right on SW Barbur Boulevard and follow trail detour sings to SW Miles Street and SW Briar Place.
WHAT YOU CAN EXPECT TO SEE
The on-ramps will close during drilling and rod installation. Message signs at key intersections on SW Bertha Boulevard, SW Barbur Boulevard and SW Terwilliger Boulevard will notify travelers of the closures. People in the vicinity of SW Trail 4 may see a temporary work platform and equipment beneath the on-ramps before and during construction. Construction may not always be visible at street level.
CONSTRUCTION NOISE
Expect periodic construction noise, mostly from heavy equipment and construction trucks (ex: required vehicle reverse noises), and other equipment such as generators, compressors and pneumatic tools. Those working or living in the area may hear noise from construction. For any noise-related concerns, please call the 24/7 nighttime noise hotline number at 503-294-1704.
To sign up for email alerts, find more project information, detour route maps and travel impacts, visit the website: tinyurl.com/onrampmaintenance. For 24/7 road conditions and traffic alerts visit tripcheck.com or call 5-1-1.
For ADA Title II or Civil Rights Title VI accommodations, translation/interpretation services or for additional information call 503-731-4128, TTY (800) 735-2900 or use the statewide Oregon Relay Service: 7-1-1.
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