UK A102 Blackwall Tunnel tidal flow stopped 

As per the header, the tidal flow has been stopped in that east London, England tunnel. I removed the entry from the article as there is no section for defunct counter flow systems. The original entry is as follows.

* The A102 Blackwall Tunnel - 2 x 2 lane tunnels, in the morning 3 lanes used for northbound (towards the city centre) traffic, 1 lane for southbound traffic, in the evening 2 lanes are provided in both directions. This counterflow system was permanently stopped on 20 April 2007 with reasons given as increased dangereous driver behavior. 

See Blackwall Tunnel article for citations and references.