I'm sure every regular city cyclist will be aware of the fact that we hold up traffic; cause motorists to slow down; and are generally responsible for any congestion on Britain's roads. Or at least that's what we're told.

What they often forget is that you can fit something like 9 bikes into the space taken up by one average car within a traffic jam; you don't take up a precious parking space with your bike; and seriously, take a look at the tailback in front of you - are the bikes sitting in the queue or cruising past it?

Logic, however, is toothless in the face of blind lack of reasoning. A bike's top speed is slower than a car's, ergo bikes hold cars up. Even in rush hour. Maybe, like us at cc Towers, you've got completely fed up with trying to argue the point. There comes a point where you realise you're never going to break through that barrier.

So we're considering the launch of a new National Take Your Car To Work Day, and we need your help and ideas. Basically we want everyone who can, who normally cycles to work, or school, or the shops, or wherever, to ditch the bike for a day and hop in the car - complete with an I'd Normally Be On A Bike sticker in the back window.

If 9 cyclists take up the space of one car, then 9 cars in many places can add up to an extra run through the traffic light sequence, and multiply that by 30, 40, 50 cyclists... A point can be made quite graphically with the right coverage, and the right publicity.

So are you up for it? How do you think we should go about it? And when? One thing we're certain of, it needs a pretty big sign-up, and has to be at a time when there is 'normal' traffic on the roads, i.e. not a bank holiday or in the school holidays.

Let us know whether you think it's a good idea or not at carday@citycycling.co.uk