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From Wazeopedia

Detour Prevention Mechanisms

291 bytes added, 2 years ago
Criteria: rearranging "possible criteria"
An '''Alternate Route''' is an alternative to a Detour or Possible Detour. It begins immediately after the last segment before the '''Possible Detour''' and ends immediately before the first segment after the Possible Detour. If it meets the criteria below for '''Direct Route, '''the Alternate Route is also a Direct Route.
<ul><li>'''Definition of a Detour.''' A detour is a a possible detour that meets all of these criteria:
<ol style="list-style-type: decimal;"><li>'''Name Discontinuity'''
<ol style="list-style-type: lower-alpha;">
</ol>
</li>
<li>'''Definition of a Direct Route''' - A Direct Route is an Alternate Route that meets all of the criteria below.:
<ol><li>'''Existence''': There must be an alternate route connecting the freeway/highway segments immediately before and immediately after the detour which does not use any of the segments used in the possible detour.</li>
<li>'''Continuity''' (one The alternate route should have name and road type continuity. Because checking for alternate route continuity requires a lot of computer resources, the waze team has tried several different approaches, and only one will change the approach they use from time to time without notice. One of these is correct)may be in use at any time, but we are never sure which one<ol style="list-style-type: lower-alpha;"><li>{{red|Type Continuity - The freeway/highway segment immediately after the possible detour must be accessible from another segment of the same road type group. This "other segment" need not be part of the Alternate Route - current guidance'''Continuity''' - All segments of the Alternate route must have both name and type continuity with the segment immediately before and the segment immediately after the Possible Detour. - Speculative. '''Probable, but unconfirmed'''.}}</li>
<li>{{red|'''Type Continuity''' - The last segment of the Alternate Route is of the same road type group as the first segment after the detour. - Possible (a less resource-intensive substitute for checking all segments of the alternate route}}</li>
<li>{{red|'''Type Continuity''' - The freeway/highway segment immediately after the possible detour must be accessible from another segment of the same road type group. This "other segment" need not be part of the Alternate Route - current guidance}}</ol></li></ol>
</li>
</ul>
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