Hope you all can help. I don't get traffic warnings on my satnav, even though I nearly always join a congested A-road with stationary traffic on my commute home. I do know the way home, but I use the satnav to forewarn me and give me alternative routes. TMC is set, traffic warnings etc. and the little symbol of the 3 cars in a row, is intermittently displayed in the top left of the screen.
I use to have a Prius and that always use to warn me of traffic delays. Is there a setting that's not set on my IS?