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Nice article! This part got me thinking: "Chlewicki is [...] experimenting with some new "mutations" of the diverging diamond, as he puts it, combining them wi
by MikeTheGreat 2y ago
Nice article!
This part got me thinking: "Chlewicki is [...] experimenting with some new "mutations" of the diverging diamond, as he puts it, combining them with roundabouts and other innovative traffic design."
Shoreline, WA (just north of Seattle, WA) is using exactly this to revise a highway overpass. They're putting in a roundabout ( coughrotarycough ) on either side of I-5 [1]
[1] https://engage.shorelinewa.gov/145corridor https://engage.shorelinewa.gov/145corridor - scroll down to the first image in the article.
I was kinda wondering where they got the idea from :)
[2] Direct link to image: https://s3-us-west-1.amazonaws.com/ehq-production-us-california/361364f4c77d6467acad4f9744b35176e87d846e/original/1697584732/5ae5aace8d60489a9451e1ae297b2f32_2023_0311_145th_Rendering.PNG?1697584732 https://s3-us-west-1.amazonaws.com/ehq-production-us-califor...
- cowboysauce 2y ago> I was kinda wondering where they got the idea from :) Parts of the country have been using roundabouts in highway interchanges for years. Western Colorado has a number of them. This one is close to 20 years old: https://www.google.com/maps/place/39%C2%B037'37.8%22N+106%C2%B029'45.9%22W/@39.627169,-106.4971179,345m/data=!3m2!1e3!4b1!4m4!3m3!8m2!3d39.627169!4d-106.496076?entry=ttu https://www.google.com/maps/place/39%C2%B037'37.8%22N+106%C2... Another one that is basically five roundabouts in a row: https://www.google.com/maps/place/39%C2%B038'12.9%22N+106%C2%B031'18.4%22W/@39.636908,-106.523182,689m/data=!3m2!1e3!4b1!4m4!3m3!8m2!3d39.636908!4d-106.521771?entry=ttu https://www.google.com/maps/place/39%C2%B038'12.9%22N+106%C2... I know of at least two others along that same stretch of highway.
- MikeTheGreat 2y agoThank you for these links! The phrase "5 roundabouts in a row" is nightmare fuel for sure, but the actual map makes it look a lot more reasonable :)