This was 1pm on Wednesday 27th Jan 2016. Yet another traffic snarl-up due to the tunnel. Every time the tunnel gets congested Dartford grinds to a halt. the reason is that no one enforces the yellow box junction on this round-about. Much of this traffic is entering the round-about to go back down onto the tunnel approach so shouldn't need to use this junction in the first place if it had been better thought out. This round-about is on one of the main roads through Dartford so when this jams solid so do most of the roads in the town.