User:RRM47/Fake road to nowhere

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Revision as of 19:11, 13 April 2015 by RRM47 (talk | contribs)

Fake Road to Nowhere

There are situations where it is necessary to introduce a Wayfinder (https://wiki.waze.com/wiki/Wayfinder#Wayfinder) that forces the Waze routing engine to consider a possible alternative to a Best Continuation (https://wiki.waze.com/wiki/Best_continuation#Best_Continuation).

The Best Continuation is only a factor when 2 or more segments leave a junction at less than 45° turn angles. In situations like this, Waze is currently not providing an audio driving instruction.

No audio instruction is given if there is a Best Continuation. If there are multiple segments, Waze will give an audio instruction to all of the segments or all but one if that one is considered to be “best”.

By “best”, this means the same road name and/or road type assuming that there is only one “best”. Also, note that the 45° turn angle is approximate and there are sometimes inconsistencies.

In situation like this, it is sometimes necessary to force one of the segments to be an equivalent Best Continuation. In doing so, none of the segments are considered a Best Continuation.

To add a fake road to nowhere, create a stub with a length that is slightly longer than 5M, or approximately 17 feet, at the intersection in question. This stub should be of the same road type and same name as the road being driven. Leave all turns disabled except for the one from the road being driven.

This Wayfinder works because the Waze routing engine considers the stub to be the obvious choice to go forward. It is the same road type and the same road name. However, it goes nowhere and the former “best” continuation no longer exists and, as a result, an audio routing instruction is generated.

One of the issues with this type of Wayfinder is the fact that Map editors may not understand why the stub was added and delete it. One workaround is to add a [NOTE] indicating the reason for the stub. Another workaround is to bend the stub until is will blend into the existing road. Neither of these two workarounds is completely successful but in some circumstances may be the only viable solution for a particular intersection.