I love waze, but I often find that alerts on the map or 30-40-60+ minutes old and no longer relevant. I'd suggest that every user who drive past a reported even be polled.

Even better would be to not award points for reported events until they've been validated by a different user (or reward partial points until validation). Token points should also be awarded for answering a poll - and polling it should be able to be disabled.

I imaging something like:

"Poll: A Wazer has reported standstill traffic at your location" options would be "Agree - Standstill traffic" "No traffic", "Heavy", etc.

"Poll: A Wazer has reported a car on side of road" "Still there", "not there"

Etc