• That'll just get motorists to do stupid things to get past cyclists.

    You could appropriate some cones and police diversion signs and simulate the traffic chaos that arises when there's a real accident.

    Of course any form of blocking the bridge would get the message out there but isn't going to get you any support from other bridge users, which is a factor that would be key in making it easier. The real trick of course would be to persuade drivers that they already don't want to use the bridge. If I were looking to run a campaign, I wouldn't do a flashmob, I'd go out to as many cycling groups, clubs, organisations, bloggers, campaigners and individual cyclists I as could and try and persuade anyone that rides across the river between 8am and 9am to use Blackfriars Bridge, especially if they otherwise use Southwark Bridge or Waterloo Bridge and to keep doing it for a month. Anyone else that wants to add Blackfriars Bridge to their ride of a morning at that time, all the better. Same time, every day, a soap-mob if you will.

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