From Wazeopedia

Detour Prevention Mechanisms

13 bytes added, 2 years ago
Changed BDP to be Big Detour Prevention instead of Big Detour Penalty. Fixed spelling on "whether".
== {{Anchor|Big Detours}}{{@|Big detours}} ==
The big detour prevention (BDP) is a [[Routing penalties|penalty]] (BDP) is meant to keep Waze from telling you to detour off a highway and then get right back on it unless it saves you enough time to be "worth it" - for example, if traffic is really slow on the "direct" route.
;Direct Route :The continuous route most users would expect. For example, a route that stays on the same freeway from point A to point B
;Alternate Route :What Waze compares a route to - when evaluating a detour route, the direct route is the evaluated alternative.
;Road Type Continuity :A set of continuous segments which all have the same road type have Road Type Continuity. If the road type changes, there is a '''road type discontinuity'''.
;Name Continuity :A set of continuous segments which all share a name have name continuity. It doesn't matter hwether whether the name is found as a primary or alternate name on any of the segments, as long as it is present in each. If one of the segments in this continuous set does not share the name shared by all the other segments, then there is a '''name discontinuity'''.
Waze makes a few checks on an off-highway '''detour''' to see if it should be prevented. It checks the length of the '''detour, '''makes sure the ''road type'' changes, and that the name is ''not'' continuous with the highway the route detours from. It also checks that there exists an '''alternate route''' that is direct - the '''direct route''' must have both continuous road type and name continuity (see details below). Waze does not consider how many 'turn...', 'keep...', or 'exit...' instructions are issued on any of the paths it checks for detour prevention.