geoffb wrote:With all due respect, why would we depend on Waze for something we can (and should) do as drivers: pay attention to the road. The whole purpose of Waze is to supplement us with tools we cannot ascertain on our own (traffic jams, better routes, etc.). I understand those who mentioned that some roads are poorly marked, but as Alan said earlier: if drivers cannot determine the speed, how can we expect it to get into Waze?
If all drivers behaved like they should, there would be no need to report speed traps or police either. A driver should also be able to recognize dangers on the road and react appropriately without using a smartphone. If we all behaved the way we should, we could remove all the reporting stuff from waze except for traffic jams.
However all the things we can report make it easier for drivers to be aware of the current situation and upcoming situations and so would speed limit indications.
Entering a freeway you have to watch traffic ahaed, traffic from behind, traffic on the left, direction signs (when driving in unfamiliar areas) and speed limit sign. The latter have the least priority for me. It has happend to me, that made my way onto the freeway, watching my front window, my mirrors and over my shoulder, but had totally missed the limit sign. "Stick with the surrounding traffic" is a nice advice. Usually 33% drive slower than the limit (e.g. trucks), 33% ignore the limt and the remaining 33% obey to it. Can be hard to tell who is who sometimes.
Where does the data come from, when drivers fail to realize the speed limit? Well, driving in unfamiliar areas Waze tells me the right way to go although I don't know jack about turn restrictions, driving directions, etc. Where does that data come from? Guess there's someone who does know...
Concerning the "other GPS navsets use speed limits for eta calculation" argument: The ones I know use the lower value of average speeds based on road type (fixed values for each type of road) and speed limit. So when you are able to always drive the maximum allowed speed, you'll arrive sooner than expected. Waze does not need that because it has "live averages". Still, indicatiting speed limits would be a helpful feature for above reasons.