Route traffic summary

This ticket tracks the discussion of adding a summary of traffic on the entire route, suitable for display to the user on the route overview screen.

This should summarize the traffic on the route currently (as opposed to comparing the current conditions to typical conditions of the same route).

Could be either

• enum, one of a fixed set of values.
• string, already-localized description (with localization).

Noting that @mapbox/navigation-ios is currently implementing and exposing this client side. Capturing from @1ec5

For reference, this feature is similar to one in the iOS navigation SDK that colors the ETA label at the bottom of turn-by-turn navigation based on the predominant traffic congestion level along the remaining portion of the route. RouteProgress.averageCongestionLevelRemainingOnLeg is public but undocumented. An implementation of the specific label above would be simpler in that it can consider every segment along the entire route unconditionally, so all that’s left is to iterate over those segments, summing up the durations of heavy segments, durations of moderate segments, etc., and determining the highest congestion level based on these sums.

@jyrigo @AhmerKhan1 is this a feature we want to support?

@mapbox/navigation-api @mapbox/navnative @danpat is this something we should expose on _Router_s side? Also cc'ing @vanmaxim for visibility as currently working on the Hybrid Router.

cc @zugaldia @truburt @mapbox/navigation-android

Inizia con l’implementazione referenziata di RouteProgress.averageCongestionLevelRemainingOnLeg in RouteProgress.swift e rivedi la discussione sull’esposizione di questo dato dal lato Router. Definisci se l’Android SDK debba esporre un enum fisso o una stringa localizzata per la congestione attuale dell’intero percorso e considera la funzionalità completa quando la rappresentazione e il punto di esposizione saranno concordati e implementati.