Keeping it moving: City still working to improve congested intersections

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Sicard Hollow Rd. /Blue Lake Rd. Intersection

The most dangerous aspects of this intersection is attempting a left turn from Sicard Hollow to Blue Lake Dr., or attempting attempting to turn left from Cahaba Heights Rd on to Sicard Hollow R. The visibility of oncoming traffic is very limited, and during peak traffic times turning left becomes very dangerous. That intersection has limited physical space needed to expand visibility, and a roundabout might not resolve the lack of visibility . A traffic light with supplemental approach lights might be safer for all drivers.

Vina Morros 182 days ago

The road?

"whether the road can handle a roundabout"? I'm sure the road will get over it.

Single-lane modern roundabouts (50-120 feet in diameter) can handle intersections that serve up to 20,000 vehicles per day with peak-hour flows between 2,000 and 2,500 vehicles per hour.

Mini-roundabouts are less common in North America, but frequently used in the UK. Their footprint is smaller, making them suitable for retrofit situations with right of way constraints (and lower cost). They are also commonly used where truck U-turns are not needed, so achieve all the safety benefits of compact modern roundabouts at a much lower cost. They are all truck apron, and in the UK are sometimes just paint on the road.
https://www.youtube.com/watch?v=-wok-PZ4pGI&feature=youtu.be

Mini-roundabouts examples:
SR 432, Kelso, WA (5 days to build): https://www.youtube.com/watch?v=py_B6Wfu1DQ
San Buenaventura, CA: http://tinyurl.com/sbv-ca-mini
Jefferson, GA: SR 124 and SR 11: https://goo.gl/maps/heUYhFzDusP2
Turin, GA: https://goo.gl/maps/8Ec3jdaHeK22
Coralville, IA: https://www.youtube.com/watch?v=Kcbx9JRx87I
Hoover Elementary, Cedar Rapids, IA: https://goo.gl/maps/zTJeSF3PMQH2
http://www.kcrg.com/content/news/Roundabout-near-Hoover-Elementary-opens-491613601.html
Gurnee, IL, Almond Rd and Dada Dr: https://goo.gl/maps/Yh3gsxafPDS2
https://www.dailyherald.com/news/20180824/gurnee-mini-roundabout-project-complete
Bel Air, MD, Tollgate & MacPhail (11,000 vpd see 1:53): https://www.youtube.com/watch?v=3KLbr1awEbk
Dimondale, MI: http://tinyurl.com/dimondale-mi-mini
Ypsilanti, MI, Textile-Stony Creek: https://goo.gl/maps/JocfG1cVutr
Ypsilanti, MI, Moon at Bemis: https://goo.gl/maps/dtj9oxdbeU52
https://www.youtube.com/watch?v=6o-BLF8n_fw
https://www.youtube.com/watch?v=YwcNz_KACEA&t=2s
Shakopee, MN, Vierling and CH 79: https://goo.gl/maps/jiPgUyP1rMw
NW 12th and N Jefferson, Ava, MO: http://www.douglascountyherald.com/2016/05/avas-new-roundabout-in-place/
Lake Ozark, MO: https://goo.gl/maps/qbTWsoSo3mw
Union City, MO: http://www.emissourian.com/local_news/union/denmark-road-opens-to-traffic-project-is-nearly-finished/article_c0073fff-d446-5b9b-be14-d1bfef9abd1d.html
Missoula, MT: Toole and Scott:
Before: https://www.youtube.com/watch?v=_jwOPI8Tfp0
After: https://www.youtube.com/watch?v=n6enK7FfvuY
Maple and Horner, Elmira, NY: https://goo.gl/maps/QDYNzD4orRU2
Maple and Caldwell, Elmira, NY: https://goo.gl/maps/vMwYQM1yUm12
Chattanooga, TN, 4th Ave and 37th St: https://goo.gl/maps/RpTaL1hBiuG2
Shawnee, OK: http://www.pawhuskajournalcapital.com/news/20171029/community-grant-shawnee-roundabout-project-wrapping-up
SW 47th Dr at 43rd Ave, Portland, OR (test): https://goo.gl/maps/9QYsp3tcUtE2
Dory Point Loop and Centerpointe Dr, Pacific City, OR:
https://goo.gl/maps/8pZ7eJaR6DS2
Vienna, VA, Park and Locust St: https://goo.gl/maps/3PsC91opoHC2
Spring and Argyle, Friday Harbor, WA: https://www.youtube.com/watch?v=fLQQuBkXItU&feature=youtu.be
164th Ave NE and NE 76th St, Redmond, WA (15,000 vpd): https://goo.gl/maps/dhab1DZ4ucn
Grandview Rd and Kickerville Rd, Whatcom County, WA (Construction): https://www.youtube.com/watch?v=TXVZ09WgBYM
White Center, WA: http://tinyurl.com/white-center-mini
St. James, MN: http://www.keyc.com/story/39476109/completed-st-james-highway-4-project-brings-mini-roundabouts-to-minnesota
Eastvale, CA: https://www.youtube.com/watch?v=xMpDFxVS4Yk

Canada:
Stanley Bridge, PE: https://goo.gl/maps/S4wf7UjsRnRyKgx66
Charlottetown, PEI: https://goo.gl/maps/EEU1wvwA1TG2 https://www.theguardian.pe.ca/news/local/reviews-good-for-new-brackley-point-roadoak-drive-mini-roundabout-102371/
Sundre, AB (3 in a row, temporary installs): https://goo.gl/maps/G6pvbqPsdsR2

Scott Batson 193 days ago

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