Non-Intersection Roundabouts

[roadfro]

https://www.google.com/maps/@38.8704552,-76.8512512,614m/data=!3m1!1e3

Here's a two leg roundabout that acts like a Michigan Left.  Drivers traveling WB on Alaking CT make a right on Hampton Park Blvd before making a u-turn at the roundabout to continue SB Hampton Park Blvd.   

See, now, to me, that just looks like a glorified crossover. That type of modified Michigan left isn't all that uncommon in less developed nations where full interchanges aren't in the budget.

I'm pretty much wrong.  There is no Michigan Left to speak of in my example.  Alaking CT looks more like a superstreet as drivers are forced to turn right to go left but instead of a signalized intersection for the crossover, a roundabout is used.

New question though: Why are the hashmarks/chevrons paints both to the left?  On one side of the roundabout, motorists will find >, while on the other side motorists will find <.

They shouldn't be chevrons, but rather slanted lines.

I imagine they are there to try to dissuade vehicles in the outer circulating lane from proceeding past the turnoff. The width of the circle at that point is two lanes, but should only be one lane wide.

[jakeroot]

Lacey, Washington ... I always thought it was strange that they built the sidewalks around the intersection as though there was never any plans to connect any other roads.



They've since built the road on the south/west side, but it's barred off to traffic so the intersection is still basically a non-intersection.

[national highway 1]

Cambridge St, Epping. This roundabout is there so that buses which terminate at the bus terminus to the south are able to U-turn and continue the other way.

http://goo.gl/maps/QMF9s

[Thing 342]

Found two within a relatively short distance: https://www.google.com/maps/@37.0450581,-76.4626862,385m/data=!3m1!1e3
The smaller one at the school is used for student pickup and drop-off. I'm not exactly sure what the larger one (along Green Ct) is for.

[NE2]

I'm not exactly sure what the larger one (along Green Ct) is for.

To allow more houses to cram into the outside of the curve. If you look at street view, it's not actually one-way.

[roadfro]

Found two within a relatively short distance: https://www.google.com/maps/@37.0450581,-76.4626862,385m/data=!3m1!1e3
The smaller one at the school is used for student pickup and drop-off.

You can't even call that one at the school a roundabout, it is more like a cul-de-sac... and since it's not even on a real street, let's just call it a circular driveway.

[Dr Frankenstein]

I believe new streets were supposed to pop out of this one, but nothing's happened so far.

https://maps.google.ca/maps?ll=45.33554,-72.641344&spn=0.012972,0.01929&safe=strict&t=m&z=16

[SteveG1988]

Why does it look like something i'd make with sim city 4 with the network addon mod.

[Truvelo]

Roundabouts like that are also used to overcome a sharp bend where the curvature of the road would normally be below design standards.

[Duke87]

I'm not exactly sure what the larger one (along Green Ct) is for.

To allow more houses to cram into the outside of the curve. If you look at street view, it's not actually one-way.

This makes absolute sense. The alternative is having a "party driveway" where the driveways of two houses combine before collectively reaching the street. Very common where I grew up, but a lot of people don't like them because it means the owners of both houses have to chip in and cooperate on maintaining the shared portion.

[NE2]

The other alternative is building several parallel driveways right next to each other. I guess the circle looks nicer.

[mapman1071]

1800 Block of West Montebello Avenue (East Of 19th Avenue) Phoenix, AZ
Map
https://www.google.com/maps/@33.519781,-112.098615,3a,75y,126.92h,90t/data=!3m4!1e1!3m2!1sZAt6uRo4PbRtsejRGf3EHQ!2e0
Earth
https://www.google.com/maps/@33.519781,-112.098615,300m/data=!3m1!1e3

Montebello runs East and West thru Roundabout
Exit Driveway comes from SouthWest from Bus Transit Center into Roundabout
Entry/Exit from Park and Ride from SouthEast into Roundabout
Entry/Exit from Super Target/Christown Spectrum Mall from North into Roundabout

[pianocello]

1800 Block of West Montebello Avenue (East Of 19th Avenue) Phoenix, AZ
Map
https://www.google.com/maps/@33.519781,-112.098615,3a,75y,126.92h,90t/data=!3m4!1e1!3m2!1sZAt6uRo4PbRtsejRGf3EHQ!2e0
Earth
https://www.google.com/maps/@33.519781,-112.098615,300m/data=!3m1!1e3

Montebello runs East and West thru Roundabout
Exit Driveway comes from SouthWest from Bus Transit Center into Roundabout
Entry/Exit from Park and Ride from SouthEast into Roundabout
Entry/Exit from Super Target/Christown Spectrum Mall from North into Roundabout

Um... an intersection between a street and a parking lot entrance is still an intersection.

[tradephoric]

A random 2-leg roundabout in Bend, Oregon.

https://maps.google.com/maps?ll=44.041045,-121.327955&spn=0.000612,0.001563&t=h&deg=270&z=20

[jeffandnicole]

Here's a roundabout with zero legs...for cars.  The roundabout is on a golfcart path in The Villages, FL:

http://goo.gl/maps/fwRAl

GSV: http://goo.gl/maps/hU4wy

[jeffandnicole]

https://goo.gl/maps/8Qx9a

A circle/roundabout that just goes around a few trees.  Take it out of GSV and you can't even see the road due to the tree coverage.

[NE2]

https://goo.gl/maps/8Qx9a

A circle/roundabout that just goes around a few trees.  Take it out of GSV and you can't even see the road due to the tree coverage.

That's a median, not a roundabout.

[yakra]

https://maps.google.com/?ll=53.718146,-2.674098&t=k&z=16

[NE2]

http://maps.google.com/?ll=53.718146,-2.674098&t=k&z=16

It's partly closed (though that part would have been useful for the park and ride).

[Brandon]

https://goo.gl/maps/8Qx9a

A circle/roundabout that just goes around a few trees.  Take it out of GSV and you can't even see the road due to the tree coverage.

That's a median, not a roundabout.

I'll politely disagree.  It's pretty much a circle from the aerial, and it allows people to make a U-turn.  Ergo, it is a mid-block roundabout, not a median.

[NE2]

There's no signage telling entering traffic to yield. Thus it's a median.

[briantroutman]

https://goo.gl/maps/8Qx9a

A circle/roundabout that just goes around a few trees.  Take it out of GSV and you can't even see the road due to the tree coverage.

That's a median, not a roundabout.

I'll politely disagree.  It's pretty much a circle from the aerial, and it allows people to make a U-turn.  Ergo, it is a mid-block roundabout, not a median.

Google Maps does show the "roundabout"  as having its own name: Bernan Circle.

[kphoger]

Roundabout/Crossover hybrid?

[jeffandnicole]

Maybe there's some sort of history behind why this circle was put there.  On the other side of the Turnpike it appears Whitford Dr would intersect directly into this circle, rather than end as a cal de sac.  But, it's definitely an unusual feature for a road or development here, and certainly doesn't appear to be just a 'median'.

[Thing 342]

This roundabout used to be a cul-de-sac IIRC: https://www.google.com/maps/@36.6882337,-75.9230056,143m/data=!3m1!1e3
I think the intent was to allow non-park traffic to turn around, but many people just ignore the pavement markings.

I think this was originally a driveway circle for the historical marker nearby, and Battlefield Tour Road was built later: https://www.google.com/maps/@37.2076368,-76.5039399,288m/data=!3m1!1e3