Regional Boards > Northwest
Washington
Amaury:
--- Quote from: Bruce on December 07, 2022, 03:20:00 PM ---WSDOT is looking to replace the triangle-shaped junction between US 195 and SR 26 in Colfax. Three design options at this open house, which would all involve eliminating the very short and unsigned SR 26 Spur.
Personally, I think the roundabout is the best option.
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That's by the Chevron there, right? Where there's the narrow bridge with turning restrictions? https://goo.gl/maps/57pGJhH1EVEpDghW8 Personally, I don't see an issue with the current configuration. It's not that busy of a junction.
I didn't know SR 26 had a spur route, though. Is the spur route the road over the bridge?
Bruce:
--- Quote from: Amaury on December 09, 2022, 07:19:02 PM ---That's by the Chevron there, right? Where there's the narrow bridge with turning restrictions? https://goo.gl/maps/57pGJhH1EVEpDghW8 Personally, I don't see an issue with the current configuration. It's not that busy of a junction.
I didn't know SR 26 had a spur route, though. Is the spur route the road over the bridge?
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The spur route is the western bridge in the junction. Both bridges have to be replaced due to their age and generally being in an inefficient layout. Despite how it looks, it does get rather busy during WSU holidays and gamedays, since SR 26 is the main route for students/fans to get to and from I-90, while US 195 is the way from Spokane.
Amaury:
--- Quote from: Bruce on December 09, 2022, 07:42:02 PM ---Despite how it looks, it does get rather busy during WSU holidays and gamedays, since SR 26 is the main route for students/fans to get to and from I-90, while US 195 is the way from Spokane.
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Sounds like University Way here between Main Street and Maple Street when CWU students are moving into their dorms in the early fall and moving out of their dorms, for those who don't stay, in the late spring.
jakeroot:
Given that it's on a slower section of both routes, I think a roundabout makes sense.
I would prefer they replace the bridge rather than build next to it, as the graphic would suggest. That awkward bend is, well, really awkward. They could keep the other bridge and temporarily reconfigure the northern intersection while they replace the other, permanent bridge.
jakeroot:
Posted this in the Redesigning Interchanges thread, I suppose more people here would find this interesting:
--- Quote from: jakeroot on February 10, 2023, 02:04:58 AM ---Here is a concept for redesigning the I-5 / WA-512 interchange in Lakewood, Washington.
Location: https://www.google.com/maps/@47.1620488,-122.4765356,1446m/data=!3m1!1e3
Currently, the WA-512 freeway ends at a cloverleaf with I-5, with the road continuing to South Tacoma Way. The current freeway has a signalized off-ramp from southbound I-5 to eastbound WA-512, replacing the original loop around 2000. Presently, the westbound 512 freeway gets very backed up approaching I-5 due to weaving from the last westbound on-ramp and the traffic light from southbound I-5.
Long-term plans call for HOV lanes along both I-5 and WA-512, so I developed this future concept with that in mind.
First, and by far most importantly, my concept separates traffic into two corridors, where there is currently one. Traffic destined for South Tacoma Way now exits at Steele St and uses a new road, which I've called South Tacoma Way, to connect to the existing South Tacoma Way (the road will become Pacific Hwy south of existing signal (far left of the image)). Traffic destined for I-5 stays on the existing WA-512, and can use a newly aligned trumpet-style interchange to connect directly with I-5 without interfering with South Tacoma Way traffic. All ramps to and from I-5 will be two lanes, and the westbound to southbound loop will be enlarged from the current loop to improve capacity and safety. Traffic from Steele St, South Tacoma Way, and other nearby roads can directly access I-5 using new ramps.
Second, there are HOV-only ramps at three locations: (1) WA-512 to/from I-5 to the north, (2) WA-512 to/from I-5 to the south, and (3) to/from the park and ride in the southwest quadrant of the existing interchange (Texas T). The HOV ramps between WA-512 and I-5 to the north (#1) are sunken below I-5, and the HOV ramps between WA-512 and I-5 to the south make a 270 degree loop and tie into the WA-512 carriageway. This keeps the entire interchange three levels, but without going above the current maximum clearance, to avoid interfering with the McChord AFB runway approach.
Third, direct-access ramps to Steele St (north south road on far right of image) will be built to connect WA-512 traffic with this important corridor, which ultimately connects to the heavily-used Spanaway Loop Road to the south. The eastbound to southbound ramp would be at the same height as WA-512, with Steele St and South Tacoma Way being elevated, but the northbound to eastbound loop ramp would be built one level below WA-512.
Fourth, demolition would be required in at least two locations: (a) portions of the Lakewood Business Park in the northwest quadrant of the interchange, and (b) businesses south of the existing WA-512 including Kent Gypsum Supply, Corona Steel, 24ResTech, and Harlow Construction.
Feedback would be appreciated.
I-5 @ WA-512 Interchange Concept by Jacob Root, on Flickr
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