Thanks, yes aware of that, just haven't got my head around how having a map of the overall area, with alerts, is helpful compared to my usage which is just to let Waze (on my phone) adjust my route according to traffic etc. and give me both audio turn-by-turn instructions and alerts for incidents (on my route)
I don't know if it is a UK / USA thing? or maybe a Urban vs. Rural (that's me ...) thing, but I am not interested in knowing what the status of surrounding roads is, only the route that I am on.
I think it's more of a personal preference and situation-specific. I use the in-car app all the time primarily because the Waze app itself will generate sub-optimal routing in several urban areas where I travel. Therefore, it's generated routing is not useful. If I have a large view of the area with Waze alert icons, I can generate a better route in my head.
Waze, Google, Apple maps, etc. all suffer from the same issue -- they generate their routing based on certain assumptions, which can frequently be inaccurate. Here's some examples:
1. An accident on a road will almost always cause the apps to generate a route that goes around it, but that accident doesn't necessarily block my own route. If the accident is at an intersection or just beyond it, but I'm turning right, my path may not be blocked or slowed.
2. Path generation in the app goes by time that's inferred from the average traffic speed on that road and/or speed limits. But traffic signals are a huge variable factor. Traffic signals can slow a surface street way more than the average traffic speed would otherwise indicate. A parallel freeway or parkway, even if congested, moves faster in many cases. This is one area where you see a UK/US difference, because UK uses many more roundabouts which don't have as much time variability, whereas roundabouts are relatively scarce in the US.
3. There are areas of certain surface streets where there is a lot of on-street parallel parking. The apps interpret these parked cars as traffic, and this can shift a generated route away from those streets, even though they're fine for through traffic.
Knowing some of these things, as well as historical traffic patterns in my area, allows me to generate my own route that's more optimal than what Waze can generate, but to do it I need a large map with all the traffic information and incidents displayed.