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Help Wanted: Road Curves

I’m muddling through a WCYDWT unit on modeling right now and I’m short on data. If you know of a curve that’s preceded by a recommended speed sign, would you copy the link from Google Maps and paste it into the comments. Obliged.

31 Responses to “Help Wanted: Road Curves”

  1. on 17 Dec 2010 at 1:42 pmDave

    Are you sure this isn’t a sneaky way of stalking your commenters? ;)

    Here’s a double-curve 30 MPH on a six-lane city street in Dallas:,-96.825246&spn=0,0.009238&t=h&z=17&layer=c&cbll=32.831272,-96.825205&panoid=MjqHZO0oRMj5W1-TeD91WA&cbp=12,325.2,,0,10.12

  2. on 17 Dec 2010 at 1:59 pmPhil

    Hope English ones are ok:,+Wigan&sll=54.136696,-4.042969&sspn=14.140409,39.506836&ie=UTF8&hq=&hnear=Orrell,+Wigan,+United+Kingdom&ll=53.424673,-2.553291&spn=0.118042,0.308647&z=12&layer=c&cbll=53.42458,-2.55311&panoid=xRwDB-QgBWqUVIyDcH7MTw&cbp=12,136.66,,0,5

  3. on 17 Dec 2010 at 2:14 pmDavid

  4. on 17 Dec 2010 at 2:17 pmBrian Caine

    Interstate-440 around downtown nashville.,+TN&sll=36.19203,-86.777751&sspn=0.000643,0.001206&ie=UTF8&hq=&hnear=Nashville,+Davidson,+Tennessee&ll=36.153989,-86.822526&spn=0.004626,0.01929&z=16&layer=c&cbll=36.154097,-86.82252&panoid=1Ef4gTciIn6VzdND_8JD0A&cbp=12,4.19,,0,10.31

  5. on 17 Dec 2010 at 2:24 pmJonathan,-122.322121&spn=0.005356,0.013937&z=17&layer=c&cbll=47.642311,-122.322121&panoid=55yQIb-5eqi4q_Yb3h2c9Q&cbp=12,257.75,,0,6.11


  6. on 17 Dec 2010 at 2:26 pmDarcyG,+mechanicsburg,+pa&sll=37.0625,-95.677068&sspn=34.724817,79.013672&ie=UTF8&hq=&hnear=2003+Harvest+Dr,+Mechanicsburg,+Cumberland,+Pennsylvania+17055&ll=40.172528,-76.969357&spn=0.008247,0.01929&t=h&z=16&layer=c&cbll=40.172439,-76.969316&panoid=pKeR1RFR8v5WSAr1I14XKQ&cbp=12,332.47,,0,5.16

  7. on 17 Dec 2010 at 2:50 pmZ. Shiner

    Here’s one close to home:,-121.955388&sspn=0.004765,0.009645&ie=UTF8&t=h&rq=1&ev=zi&radius=0.32&split=1&filter=0&hq=Highway+17+and+85&hnear=&ll=37.256301,-121.955109&spn=0,0.009645&z=17&layer=c&cbll=37.256367,-121.95505&panoid=gjzjZyNEbFqdAYpMw-UnkQ&cbp=12,59.41,,0,5.8

    I remember it because it’s the turn I almost spun out on going home on a rainy day once.

  8. on 17 Dec 2010 at 2:58 pmPhil

    and another:,-1.865616&spn=0.014966,0.038581&z=15&layer=c&cbll=52.510536,-1.865405&panoid=5VvQrfFKALOkl8xsbweV9w&cbp=12,287.98,,0,5

  9. on 17 Dec 2010 at 3:02 pmPhil,-2.723193&spn=0.014704,0.038581&z=15&layer=c&cbll=53.571088,-2.723153&panoid=5DNYMCUYrQBdekcoE-jpMA&cbp=12,203.17,,0,5

  10. on 17 Dec 2010 at 4:28 pmChris Craft (@crafty184)

    Hi Dan,

    We have a famously horrendous interchange between two major interstates in Columbia, SC. It has earned the nickname “Malfunction Junction” because it is so poorly designed. In fact, many many crashes occur there.

    Here is a link to the beginning of one of the worst curves, going from I26 to I20, where trucks often turn over, hence the warning.


  11. on 17 Dec 2010 at 5:07 pmHal

    10 MPH, on LI, NY,+ny&sll=37.0625,-95.677068&sspn=49.71116,79.013672&ie=UTF8&hq=&hnear=Miller+Place,+Suffolk,+New+York&ll=40.961866,-72.992027&spn=0.005833,0.009645&t=h&z=17&layer=c&cbll=40.961893,-72.991912&panoid=YBhhYSPEMH8_R0bMN4TJyA&cbp=12,257,,0,19.62

    Zoom out a bit, or move forward, to see the curve

  12. on 17 Dec 2010 at 5:24 pmBill

    A nice, curvy downhill road.,-78.657784&sspn=0.002353,0.004823&ie=UTF8&hq=&hnear=East+Aurora,+Erie,+New+York&ll=42.77822,-78.679366&spn=0.004693,0.009645&t=h&z=17&layer=c&cbll=42.77822,-78.679366&panoid=WdSdWdbxKRy03_8MpiTPSg&cbp=12,284.56,,0,5

  13. on 17 Dec 2010 at 6:33 pmSarah,-78.679361&sspn=0.005127,0.010149&ie=UTF8&hq=&hnear=Clark+State+Rd,+Ohio&t=h&layer=xc&g=Gahanna-jefferson+City+School+District,+Clark+State+Road,+New+Albany,+OH&ll=40.035632,-82.834575&spn=0.004797,0.020299&z=16&cbll=40.035629,-82.834568&panoid=-L0uAQDBSmlH0lWs2LcmLQ&cbp=11,263.33,,0,5

  14. on 17 Dec 2010 at 6:38 pmJoao

  15. on 17 Dec 2010 at 6:53 pmLois,+centreville&layer=c&sll=38.875414,-77.472514&cbp=13,170.15,,0,0.67&cbll=38.878756,-77.479611&hl=en&sspn=0.006295,0.006295&ie=UTF8&hq=&hnear=Braddock+Rd+%26+Old+Lee+Rd,+Sully,+Fairfax,+Virginia&ll=38.878804,-77.479706&spn=0.000879,0.002016&t=h&z=20&panoid=hnXv8qkVpw81wkPArzuIlw

  16. on 17 Dec 2010 at 7:13 pmDan Callahan,+Bala+Cynwyd,+PA&sll=42.424376,-71.178953&sspn=0.0099,0.020363&ie=UTF8&hq=&hnear=Montgomery+Ave,+Pennsylvania&ll=40.006647,-75.231816&spn=0.001284,0.002545&z=19&layer=c&cbll=40.006684,-75.231713&panoid=3S1Zh76qLLdE-EJI31MrFg&cbp=12,67.1,,0,-12.73

  17. on 17 Dec 2010 at 9:04 pmHolly

    Drove this stretch of Rt 151 near Asheville, NC last month. It’s so curvy that the Google street view camera looses track of which way is straight ahead moving frame to frame!,+NC&sll=34.09062,-84.191371&sspn=0.010093,0.019119&ie=UTF8&hq=&hnear=Asheville,+Buncombe,+North+Carolina&ll=35.434738,-82.730752&spn=0.002247,0.009559&t=h&z=17&layer=c&cbll=35.434736,-82.730756&panoid=ruFrl-5JHBeu5-ooRurqSQ&cbp=11,344.58,,0,8.63

  18. on 17 Dec 2010 at 11:12 pmJames McKee

    Exit ramp from I-90 East to I-15 South, Silver Bow, Montana,-112.641964&spn=0,0.181103&t=h&z=13&layer=c&cbll=46.007591,-112.641763&panoid=JoExvDvZcMcKzoC9HGQwhw&cbp=12,88.62,,0,8.33

  19. on 18 Dec 2010 at 6:59 amlondondj0430

    Middle of town, Thermopolis, WY

  20. on 18 Dec 2010 at 7:41 ammonika hardy,+Larimer,+Colorado&gl=us&ll=40.396352,-105.022927&spn=0.000925,0.002213&t=h&z=19&layer=c&cbll=40.396302,-105.023022&panoid=cc4dwLtUWp2MmKWCA3bLwA&cbp=12,106.13,,0,8.1

    my kids used to make me drive the long way because they were afraid of this curve. now my daughter drives it. pretty sure she’s the only one that does it at the recommended speed.

  21. on 18 Dec 2010 at 10:19 amMichelle

    How about a Canadian one?,-97.15369&sspn=25.825869,86.572266&ie=UTF8&hq=&hnear=Sarnia,+Lambton+County,+Ontario&ll=42.982172,-82.344074&spn=0.02857,0.084543&z=14&layer=c&cbll=42.982493,-82.344059&panoid=JuuaKkWhuTl-g5fne09K-A&cbp=12,33.18,,0,-2.77

    In km/h of course!

  22. on 18 Dec 2010 at 12:44 pmRachael

    And one from New Zealand (also in km/h) :-)

  23. on 19 Dec 2010 at 9:56 amElaine C.

    Don’t have the link/time to look it up right now… but if you’re ever near the south(ish) end of Santa Cruz, on the 1, coming into town… there’s that crazy right split where it joins the 17… the ‘Curve Sharpens’ sign where you need to drop to 15 mph before speeding up to avoid getting run over by the cars on the 17.

    … If you’ve ever driven it, you’ll remember it. If not, I’ll try to post the link later…

  24. on 19 Dec 2010 at 2:32 pmSteven Peters

    None of my favorite crazy sharp turns have recommended speeds. They just have arrows pointing which way the turn is.

    I did find a link to a highway design guide that may be interesting to you if you want to see how many of these turns are designed. They apparently call the constant radius turns “horizontal curves.”

  25. on 19 Dec 2010 at 2:45 pmIan H.

    For those of us who drive using measurements that make sense, here’s one near where I live at the start of a fairly sharp “S” bend in the highway:,-105.761604&spn=0.123973,0.363579&t=h&z=12&layer=c&cbll=53.071081,-105.761759&panoid=u6By5m9jgsQ5WiBVDla6Wg&cbp=12,209.83,,0,5.94

  26. on 19 Dec 2010 at 3:14 pmDan Meyer

    The curve Elaine refers to is this one right here. I drove past it hundreds of times when I lived in Santa Cruz and it blew my mind every single time. It’s my inspiration for this WCYDWT unit.

    @Everyone, thanks for helping out.

  27. on 20 Dec 2010 at 8:58 amOlga

    A little behind, I see.,+River+Road,+Windham,+ME&sll=43.669446,-70.35736&sspn=0.007217,0.01929&ie=UTF8&hq=&hnear=River+Rd,+Windham,+Maine&ll=43.756697,-70.436633&spn=0.007207,0.01929&z=16&layer=c&cbll=43.756849,-70.43677&panoid=UB-KbKLlOJjlp5SkbrJPHg&cbp=12,301.2,,0,6.5
    Hope it’s still useful.

  28. on 21 Dec 2010 at 7:34 pmBrian

    The curve I drive down every day:,-83.753302&spn=0.00224,0.005198&t=h&z=18&layer=c&cbll=42.229167,-83.753295&panoid=_BCRaWh3pGX0oEuqCUoeLg&cbp=12,2.66,,0,5

    Interestingly (though not surprisingly given what I’ve learned about how government agencies operate), there’s another speed limit sign for 10 mph faster before you actually get to this S-curve. . .

  29. on 22 Dec 2010 at 8:28 pmAaron F.

    Here’s one in suburban Michigan!,-83.308575&spn=0.00467,0.017166&z=17&layer=c&cbll=42.566493,-83.308449&panoid=9QbI6CxZglgQ0P987kT7Uw&cbp=12,130.69,,0,-11.82

    And here’s another!,-83.32497&panoid=KfllLYsdQTO_79btRDmGtg&cbp=12,90.89,,0,5&ll=42.568759,-83.325098&spn=0.009276,0.026157&z=16

    Strangely, there’s no sign for drivers going the opposite direction…

  30. on 23 Dec 2010 at 8:10 amMike L.

    It’s not the best pic of the sign, but it’s a hard corner with a suggested limit of 20mph.,-70.7547&sspn=0.582774,1.674042&ie=UTF8&hq=&hnear=Goodwin+Rd,+Eliot,+Maine&ll=43.156052,-70.784665&spn=0.004555,0.017166&z=17&layer=c&cbll=43.156094,-70.784556&panoid=X7RXWm1tu2ux9E6iohBOHA&cbp=12,249.03,,0,4.04

  31. on 29 Dec 2010 at 4:34 pmbarefootmeg

    wow! looks like you’ve got a lot already.

    this road near silverton is like that scene in pee wee herman’s big adventure where you get multiple curvy’s. there’s no specific addresses, but if you google for Silverton, U.S. 550, CO you’ll see what i mean in terms of curviness. many of those curves have signs before them.