I come back from some days off and take back the discussion.
Of course I speak about traffic jam and I think it could be possible to touch waze users by adding some information in the application like % slowed down.
Maybe to difficult to implement.

a 'standstill' is only selected if you are in a bumper-to-bumper situation and movement is approximately one car length every 10 minutes and above, and you are NOT at a traffic light junction

moderate and heavy traffic are not specified

https://wiki.waze.com/wiki/How_to_Report

Alan, we can makes rules about it, but there are a lot more waze-users than waze-editors... don't expect you can reach everyone

same for 'minor' or 'major' accidents

don't worry, me too... cursed traffic lights (especially the RED ones) - when it generates a traffic jam, it is a traffic jam (I have myopia, I can't see that well in the distance )

Well, for starters, i would use the correct terms:
A roadblock is not moderate, severe, standstill... a roadblock is when the road is closed and you use road closures...
Traffic jams are moderate, severe, standstill ...
I don't know if it's really usefull to make some extra classificitation, you use what seems correct to you, based on the aspects of the road and situation.
Routing will take care to determine what the importance is, based on the speed data, versus historical speed data, versus average speed data, ...

, me too...

annickdw wrote:... movement is approximately one car length every 10 minutes and above, and you are NOT at a traffic light junction ...

When it takes that long at a traffic light junction, there's something wrong in my opinion and I report a traffic jam, maybe even a standstill.

Acidoxy wrote:I come back from some days off and take back the discussion.
Of course I speak about traffic jam and I think it could be possible to touch waze users by adding some information in the application like % slowed down.
Maybe to difficult to implement.

When somebody reports a traffic jam it usually gives a average speed over that section to all other users as well. It uses my speed to calculate it and it goes down as long as it notices the standstill.