Eureka! May be my Nuvi 765t had lost courage after French coppers and became 'silent fish'. If it so I will drag through the mire all french cars on the road. France generate a net loss for me! The first, illness dumbness for Nuvi 765t. The second, weird dangerous zone instead of the speed cameras. And at the end, at last Saturday I had headache after one and a half liter of Hennessy what I drank at last Friday.