Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Marcus Wolschon
Am 14.02.2018 um 18:21 schrieb Dave F: > On 14/02/2018 16:46, Marcus Wolschon wrote: >> >> We often have roundabouts with dedicated lanes leading only to the >> (heavily trafficed) exit >> just off to the right. These are not part of the logical roundabout >> and the particular traffic rules

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Dave F
On 14/02/2018 16:46, Marcus Wolschon wrote: We often have roundabouts with dedicated lanes leading only to the (heavily trafficed) exit just off to the right. These are not part of the logical roundabout and the particular traffic rules regarding roundabouts do not apply. Yet they share nodes

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Marcus Wolschon
Am 14.02.2018 um 16:55 schrieb Dave F: > > > On 14/02/2018 15:46, Philip Barnes wrote: >> If an entering way shares a node with an exiting way there is no need >> to pass through a roundabout way > > If that shared node is also part of junction=roundabout, then it does > "need to pass through".

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Dave F
On 14/02/2018 15:46, Philip Barnes wrote: If an entering way shares a node with an exiting way there is no need to pass through a roundabout way If that shared node is also part of junction=roundabout, then it does "need to pass through". It also messes up the exit count in navigation

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Philip Barnes
If an entering way shares a node with an exiting way there is no need to pass through a roundabout way to navigate between them hence the roundabout will not be seen. It also messes up the exit count in navigation instructions. Phil (trigpoint) On 14 February 2018 15:38:01 GMT+00:00, Dave F

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Dave F
To be doubly clear, this is an example of a road entering a roundabout & sharing a node with it: https://www.openstreetmap.org/node/19091900 Dave F. On 14/02/2018 15:21, Dave F wrote: On 14/02/2018 15:02, Marcus Wolschon wrote: What you describe is a mini-roundabout. No it wasn't. It was

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Dave F
On 14/02/2018 15:02, Marcus Wolschon wrote: What you describe is a mini-roundabout. No it wasn't. It was perfectly clear as I posted the 'junction=roundabout ' page. Much of the following is incoherent to me. The rest is irrelevant to my point. DaveF That has a different geometry as the

Re: [Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Marcus Wolschon
What you describe is a mini-roundabout. That has a different geometry as the center of that one is traversable. https://wiki.openstreetmap.org/wiki/Tag:highway%3Dmini_roundabout a) I don't see a node as anything you "are on" at any time. Only segments. At most nodes are considered for

[Routing] Roundabouts - why is a separate segment required?

2018-02-14 Thread Dave F
Hi Could anyone give me an explanation for this line from https://wiki.openstreetmap.org/wiki/Tag:junction=roundabout "Each road has to be connected with the roundabout in a separate node—that is, between these nodes a segment of the roundabout is required." I see no requirement for a