Detour detection mechanism in the wiki

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Re: Detour detection mechanism in the wiki

Postby AlanOfTheBerg » Tue Nov 19, 2013 5:07 pm

CBenson wrote:What's soon? I've added the page.

7 days ago. :mrgreen:

Looks good. I changed the last paragraph to a small table for what I feel is faster reference/scanning. Also broke out major highway from freeway just in case it changes later. Minor Freeway may also have a different definition, though 5km is likely.
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Re: Detour detection mechanism in the wiki

Postby AlanOfTheBerg » Mon Nov 11, 2013 5:54 pm

CBenson wrote:Is there any objection to adding my language as a page under the Technical Information section of the wiki?

I'm fine with it. If you put this together soon, I'll throw a tweet out about it this week.
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Re: Detour detection mechanism in the wiki

Postby AlanOfTheBerg » Mon Nov 04, 2013 10:06 pm

CBenson wrote:You're certainly correct that there isn't another "large" detour prevention mechanism, so the "small" is not necessary.

Yeah, but maybe there will be some day, so to give this a better name, perhaps 'small' is ok. I'm having trouble figuring out what else we could call it...
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Re: Detour detection mechanism in the wiki

Postby AlanOfTheBerg » Mon Nov 04, 2013 10:00 pm

CBenson wrote:Small Detour Prevention Mechanism

Why the "small" here? To try and differentiate it from "large" detours which are as yet undefined in terms of Waze? I think I'm ok with it, but want a small explanation here. (pun intended)

We could make it a template file?
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Detour detection mechanism in the wiki

Postby AlanOfTheBerg » Mon Nov 04, 2013 9:33 pm

Should the detour detection mechanism be published in the wiki? I couldn't find it, though it has been in the Global Champs forum for quite a long time, and has also appeared in the public forums. Is there a reason why it should not be?

The "detour detection mechanism" tries to prevent route options that exit major roads into minor roads (ramps, streets etc.), in order to save negligible driving time.
The idea is that drivers will prefer to remain on the major road, even if it is just a bit longer or slower.

The following scenarios are considered as a detour, and will not be shown as a possible route alternative:

  1. If the start point of the detour and end point of the detour have the same street name (only main street name - not alternative name)
  2. Detour must be more than 1 segment long (between 2 segments with the same name).

The mechanism handles 2 types of detours with slightly different properties:

  1. Highways:
    • Road types: Freeway, Major Highway - it's a detour only if the detour started out of these types, got back to these types, and in the middle the types are different.
    • Bypass length is 5km - under this threshold, the route is considered to be a detour and will not be shown as a possible route. If it is longer then 5km, it will be considered as a valid new route - and there for will be shown as a possible route.
  2. Minor Highway:
    • Road types: Minor Highway - same role here, it's a detour only if the detour started out of these types, got back to these types, and in the middle the types are different.
    • Bypass length is 500m - again, same role here as well, under this threshold, the route is considered to be a detour and will not be shown as a possible route. If it is longer then 500m, it will be considered as a valid new route - and there for will be shown as a possible route.
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