When will drivers understand that even when the traffic is moving slowly, or has stopped temporarily, they are still driving the vehicle?
Slow moving traffic on the North Circular approaching the A1 junction. I noticed the vehicle breaking oddly and for no reason; it was obvious the driver was distracted.
I knocked on the window to attract her attention.
Her reaction was a usual one. I'm not moving so it is OK. She had been moving and was on the phone.

Registration WF59 FPU