Mountable Medians

[Brandon]

How common are mountable medians throughout the country?  We seem to use them a lot here in Illinois, not as much as we used to, but still quite a bit, and new ones are still made.  They are intended to be crossed for left turns.

Here's some examples from GSV:

IL-59, Plainfield
IL-58 (Golf Rd), Schaumburg
IL-53, Woodridge

[Big John]

They are frequent in Wisconsin too.  In other parts of the country, they are usually flush for the same purpose.

[peterj920]

Here are some examples in Green Bay, WI.  Come in all sorts of different widths

https://www.google.com/maps/@44.5322368,-88.0667102,3a,75y,66h,63.69t/data=!3m6!1e1!3m4!1sw85QE2kBXm0Cf9U87ZmmtA!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.4927697,-87.9819172,3a,75y,101.13h,72.28t/data=!3m6!1e1!3m4!1sHF2io2b1hfXbb4UFSLAovg!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.535635,-88.0559763,3a,75y,10.46h,73.01t/data=!3m6!1e1!3m4!1sc2RobQiom-YB_ElVstxzTg!2e0!7i13312!8i6656?hl=en

[Big John]

^^ The first 2 were circa 1970's construction and I thought they are more used as a rumble strip for any errant vehicles.

[DaBigE]

Here are some examples in Green Bay, WI.  Come in all sorts of different widths

https://www.google.com/maps/@44.5322368,-88.0667102,3a,75y,66h,63.69t/data=!3m6!1e1!3m4!1sw85QE2kBXm0Cf9U87ZmmtA!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.4927697,-87.9819172,3a,75y,101.13h,72.28t/data=!3m6!1e1!3m4!1sHF2io2b1hfXbb4UFSLAovg!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.535635,-88.0559763,3a,75y,10.46h,73.01t/data=!3m6!1e1!3m4!1sc2RobQiom-YB_ElVstxzTg!2e0!7i13312!8i6656?hl=en

Your last example, yes. The other two are iffy (further down the street in the first example has areas meant to be crossed), as they are otherwise known as corrugated medians and are generally not meant to be driven on. I think what Brandon is looking for are basically raised TWLTLs delineated by mountable curb on either side.

There are a few rural single-lane roundabouts in Wisconsin that have shorter versions (used for driveway access within the median/splitter island) of what Brandon is describing, unfortunately they're too new to appear on StreetView or satellite.

[hbelkins]

We got into a slight discussion on this subject in another thread that someone with more initiative than me will have to look up and link to.

Kentucky uses them, and they're evident on several sections of US 23 that were built in the 1990s.

[cl94]

New York used to use them. In almost every case, they have been replaced by typical center turn lane markings or diagonal striping, but a few cases still exist in the wild. Here, they took the form of a flush concrete surface in the middle of an asphalt road, somewhat like this. This example is small, but there were several more prominent examples until ~10 years ago. Once upon a time, this was how New York often marked flush medians, center turn lanes, and the like.

[peterj920]

Here are some examples in Green Bay, WI.  Come in all sorts of different widths

https://www.google.com/maps/@44.5322368,-88.0667102,3a,75y,66h,63.69t/data=!3m6!1e1!3m4!1sw85QE2kBXm0Cf9U87ZmmtA!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.4927697,-87.9819172,3a,75y,101.13h,72.28t/data=!3m6!1e1!3m4!1sHF2io2b1hfXbb4UFSLAovg!2e0!7i13312!8i6656?hl=en

https://www.google.com/maps/@44.535635,-88.0559763,3a,75y,10.46h,73.01t/data=!3m6!1e1!3m4!1sc2RobQiom-YB_ElVstxzTg!2e0!7i13312!8i6656?hl=en

Your last example, yes. The other two are iffy (further down the street in the first example has areas meant to be crossed), as they are otherwise known as corrugated medians and are generally not meant to be driven on. I think what Brandon is looking for are basically raised TWLTLs delineated by mountable curb on either side.

There are a few rural single-lane roundabouts in Wisconsin that have shorter versions (used for driveway access within the median/splitter island) of what Brandon is describing, unfortunately they're too new to appear on StreetView or satellite.

I thought that there might be a possibility that the first 2 examples I provided might be debated.  I posted them because they function as a median, but they can be crossed if someone wants to turn left.  Wis 57 in De Pere and Velp Ave in Green Bay had corrugated medians, but were taken out with resurfacing and reconstruction projects so they're probably on their way out.