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Old 02-08-2013, 08:07 AM
 
Location: Kirkwood
22,178 posts, read 16,186,764 times
Reputation: 4908

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Quote:
Actually for 2 major intersections at a freeway junction it is VERY pedestrian friendly when you consider the previous conditions or other alternatives.

The major reason is pedestrians are given 50% of crossing time w/o conflicting points with cars.

It is one of the weird nuances of the design. It doesn't look friendly, albeit, but it lowers the conflict points were autos and cars cross pat
Having never used one, but looking at the aerial photo it did look that way.
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Old 03-26-2013, 02:49 PM
 
436 posts, read 491,335 times
Reputation: 164
Quote:
Originally Posted by rcsteiner View Post
Small ones are pretty simple. Larger multi-lane roundabouts can get more involved, especially since the rules used here in the US seem to be different from the rules I remember being used in the UK.
These are the US rules for roundabouts:

- Be in the correct lane before entering the roundabout.

- Yield to cars in the circular roadway before entering it. Once you are on the circular roadway, other traffic is supposed to yield to you.

- Never enter alongside another car that is already on the circular roadway.

- Never pass other cars in the circular roadway.

- Never change lanes in the circular roadway.

- Signal a right turn as soon as your exit is next.


The main differences between the US roundabout and the UK roundabout:

- They drive on the left in the UK.

- UK motorists are to start signaling before they enter the roundabout, and signal according to the direction they are going to end up going.

- In the US, the motorist is to signal a right turn when the exit they are going to leave by is the next exit.

Last edited by Troubleshooter; 03-26-2013 at 02:59 PM..
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Old 03-26-2013, 02:51 PM
 
Location: Kirkwood
22,178 posts, read 16,186,764 times
Reputation: 4908
Quote:
Originally Posted by Troubleshooter View Post
These are the US rules for roundabouts:

- Be in the correct lane before entering the roundabout.

- Yield to cars in the circular roadway before entering it. Once you are on the circular roadway, other traffic is supposed to yield to you.

- Never enter alongside another car that is already on the circular roadway.

- Never pass other cars in the circular roadway.

- Never change lanes in the circular roadway.

- Signal a right turn as soon as your exit is next.
That's asking a lot for Atlanta drivers! Hell nobody in Atlanta knows how to use a turn signal!
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Old 03-26-2013, 03:07 PM
 
436 posts, read 491,335 times
Reputation: 164
Quote:
Originally Posted by cqholt View Post
That's asking a lot for Atlanta drivers! Hell nobody in Atlanta knows how to use a turn signal!
For a single lane roundabout, only two of those rules apply.

- Yield to cars in the circular roadway before entering it. Once you are on the circular roadway, other traffic is supposed to yield to you.

- Signal a right turn as soon as your exit is next.

The other rules are there to keep cars in multiple lanes from interfering with each other:

Use the correct lane, don't change lanes, and don't pass.

We have both kinds here, and they work quite well.
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Old 03-26-2013, 04:51 PM
 
28,149 posts, read 24,687,439 times
Reputation: 9549
Quote:
Originally Posted by toll_booth View Post
That interchange is proof that--wait for it--the government can actually get it right!
Not to derail the thread but some people would claim the private sector would have done this a lot sooner and cheaper. ;-)

My personal experience with the Ashford Dunwoody interchange has been good. It's still a busy intersection but it seems to move better than the old setup, which was a complete mess.
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Old 04-01-2013, 12:07 AM
 
Location: Hellanta.com
36 posts, read 56,944 times
Reputation: 37
This is kind of stupid.... So Pleasant Hill and Jimmy Carter are going to have 2 'competing' bridges..6 million dollars.. New bridge needed in 10 years anyway...construction will at least take 8 months - 1 year... What a waste..
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