Daniel J. Hofmann
d53c267129
Roundabout Intersections are roundabouts with up to four ways and turn
angles which makes the turns obvious, e.g. as in:
```
*
*
* * * *
*
*
```
but not
```
*
*
* * *
* *
* *
```
For Roundabout Intersections we issue instructions such as
"turn <direction>" instead of "take the <nth> exit".
At the moment we have a limit on the radius for these Roundabout
Intersections of 5 meters. Which fails to classify a wide range of
Roundabout Intersections in the US (with the US-wide streets).
This changeset removes the Roundabout Intersection radius limit:
- if the roundabout is larger than a threshold and is named we classify
it as a rotary
- if the roundabout matches our criteria for Roundabout Intersections
we classify it as a Roundabout Intersection
- else fallback to plain old Roundabout
There is a second issue with determining a roundabout's radius.
But that's for another pull request (tracking in #2716).
References:
- https://github.com/Project-OSRM/osrm-backend/issues/2716
38 lines
1.7 KiB
Gherkin
38 lines
1.7 KiB
Gherkin
@routing @guidance
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Feature: Basic Roundabout
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Background:
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Given the profile "bicycle"
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Given a grid size of 10 meters
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Scenario: Enter and Exit
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Given the node map
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| | | a | | |
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| | | b | | |
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| h | g | | c | d |
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| | | e | | |
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| | | f | | |
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And the ways
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| nodes | junction |
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| ab | |
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| cd | |
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| ef | |
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| gh | |
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| bgecb | roundabout |
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When I route I should get
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| waypoints | route | turns |
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| a,d | ab,cd,cd | depart,roundabout turn left exit-3,arrive |
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| a,f | ab,ef,ef | depart,roundabout turn straight exit-2,arrive |
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| a,h | ab,gh,gh | depart,roundabout turn right exit-1,arrive |
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| d,f | cd,ef,ef | depart,roundabout turn left exit-3,arrive |
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| d,h | cd,gh,gh | depart,roundabout turn straight exit-2,arrive |
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| d,a | cd,ab,ab | depart,roundabout turn right exit-1,arrive |
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| f,h | ef,gh,gh | depart,roundabout turn left exit-3,arrive |
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| f,a | ef,ab,ab | depart,roundabout turn straight exit-2,arrive |
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| f,d | ef,cd,cd | depart,roundabout turn right exit-1,arrive |
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| h,a | gh,ab,ab | depart,roundabout turn left exit-3,arrive |
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| h,d | gh,cd,cd | depart,roundabout turn straight exit-2,arrive |
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| h,f | gh,ef,ef | depart,roundabout turn right exit-1,arrive |
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