I would like to suggest a feature of marking on the map possible speed camera sites.
I realise there are icons to report police and speed cameras, but it would be good to report speed-traps specifically (camera vans and officers with hand held devices). They usually set up in the same places and it could be a possible warning. This would mean that Waze would also perform the same role as devices such as Roadangel, which warns you of possible accident blackspots. I would find this really useful personally.
The way it could work is if a certain number of Wazers report a speed trap at a particular location it is marked on the map. Once marked it warns other Wazers of a possible speed trap. As they go past they are asked to confirm the presence of a speed trap. This data is then used to define the times at which the speed trap is likely to be utilised and I believe this is valuable data as well.
I've been having a good read of some old posts but this didn't come up so apologies if its been mentioned before. I did notice that people tend to dislike too many alerts, but it would be very easy to have this particular feature as optional so you could switch it off.
This would add valuable functionality to Waze to warn drivers of blackspots before they become accidents. This idea was prompted by a recent experience where I encountered a camera van on a dual carriageway but it was not reported on Waze as police. Everyone around me slammed their brakes on and the traffic bunched up. I could see this as dangerous and warning of the van would have been useful.