[Script] WME Validator 2019.09.24 (PLACES BETA)

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drivable segment has a very acute turn

Postby dbraughlr » Thu Mar 13, 2014 2:34 pm

A bowtie U-turn is not too sharp. These turns probably can be detected as a turn from a one-way street to a one-way street with the same or similar name.

Spreading the nodes can lead to an incorrect "stay right" instruction for traffic continuing straight through the intersection or missing road reports for drivers making the U-turn.
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Re: drivable segment has a very acute turn

Postby dbraughlr » Thu Mar 13, 2014 8:44 pm

berestovskyy wrote:Validator does not report too-sharp bow-ties.
...
Sure, Validator can look for similar street names, but I guess it will eliminate any use of this check, because the check basically was designed to detect situations like this...

Yes, this is just a transition from divided to undivided. I thought that it was a simple case for demonstration. I didn't know that you had logic to detect an intersection.

A transition like this is valid and should be permitted.
What error would ever be missed by permitting this specific configuration?
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Re: drivable segment has a very acute turn

Postby dbraughlr » Thu Mar 13, 2014 9:58 pm

1. The U-turn must be allowed.
2. Widening the U-turn could give rise to "Stay right" instructions for traffic going straight through.
3. Moving the split will result in Missing Road MPs when drivers make the legal U-turn.

Regardless, the example you gave doesn't match the transition scenario at all and would be detected because of either:
  1. The junction does not have a two-way street splitting into two one-way streets departing at less than 60 degrees from the two-way and within 90 degrees of each other. Or,
  2. The names of the one-way lanes do not begin with the name of the two-way street.
An at-grade connector is a one-way street that is usually unnamed. The duplicate right turn on the two-way portion should be disallowed.
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Re: drivable segment has a very acute turn

Postby dbraughlr » Fri Mar 14, 2014 5:37 am

As long as we are quoting the wiki:
NOTE: Be aware of the geometry used in the bow tie. If the angles are too steep (45 degrees or greater) a driver traveling along one of the one-way segments may be told to "turn" or "stay" at the intersection instead of receiving no instruction.
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Re: drivable segment has a very acute turn

Postby dbraughlr » Fri Mar 14, 2014 5:43 am

sketch wrote:If a distinction can be made between at-grade connector too-sharp turns and transition too-sharp turns, …

I gave two rules which should be adequate to isolate the vast majority of divided↔undivided transition.
I think they are easily distinguished from intersections with AGCs. The most obvious being that the two-way segment enters and leaves the junction. In a transition, the two-way stops at the junction.
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Re: corrupted elevation

Postby dbraughlr » Sun Mar 23, 2014 11:40 pm

I have not encountered this bug. Enough people have that it deserves its own thread.
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Re: report rerun

Postby dbraughlr » Tue Mar 25, 2014 6:08 pm

The results should update dynamically when you change elements. Otherwise, press the χ icon to delete old results.
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Re: corrupted elevation

Postby dbraughlr » Tue Mar 25, 2014 9:11 pm

BellHouse wrote:we can let this issue sleep again.

The issue belongs in another thread - not in this one.

It might be helpful if a moderator would move some of the elevation discussion from this thread to the other.
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Re: alternate street + city

Postby dbraughlr » Wed Mar 26, 2014 4:25 pm

berestovskyy wrote:Any ideas?

String them together using delimiters, e.g. name + '\t' + city + '\n'.
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Re: right turn should be allowed

Postby dbraughlr » Mon Mar 31, 2014 8:53 pm

berestovskyy wrote:2. No right* turn (for any drivable road)
* for the right-hand traffic
Report/highlight the segment if at the node:
a) there is a 90±5° right turn

Why not any segment between 80° and the continuation segment or 180° whichever is less?
Of course, when the continuation segment is <80°, it is the right turn.
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