The junction outside the Bank of England is truly awful; a vast open space of tarmac, motor traffic thundering through in five directions, and pedestrians accommodated on tiny pavements. What should be a beautiful civic space is devoted to motor traffic flow.
To be fair to the City of London, they have recognised the problem, and are looking to make improvements. It seems they are examining the potential for closing off motor traffic from certain directions, or at certain times of day.
But here’s the method they are choosing to employ for examining the options -
At the moment we are establishing how wide the impact might be if we make big changes at the junction. This will give us the starting point of what we will need to look at in detail. We should complete this work by September 2014.
Our next task will be to build a computer traffic model to assess what is likely to happen if traffic is prevented from crossing the junction for example in certain directions or times of day. Information from pedestrian and cycling movements will also help to develop solutions. This is likely to be a big piece of work and will take some time to complete but it is very important to have credible options for alterations to the junction. We hope to have this work completed by early 2016.
They are building a computer traffic model to do so – in their own words, ‘a big piece of work’ that is going to take one and a half years to complete. Eighteen months. There is no word on how much this is going to cost.
I imagine the complexity here is due to the fact that we don’t really know how to model people cycling and walking, as described in this excellent post by smalltown2k. It’s really very difficult, and the City appear to be attempting to do so. Now obviously the ability to model these kinds of movements is going to be very important in the future, and it is valuable that we can start to assess what might happen to traffic flow if we acknowledge how people walk and cycle about, and how they might shift mode under different conditions.
But really, rather than just building a hugely complex model from scratch to find out what happens when a junction is closed to motor traffic, couldn’t the City just do it, on a trial basis? If the result is genuine chaos, then the trial can quickly be abandoned.
There are good reasons for thinking a trial of this kind – closing roads at Bank temporarily – would not result in chaos. The main one is that the area is ringed by major arterial roads, composed of London Wall to the north, Aldgate and Tower Gateway to the east, and Upper Thames Street to the south.
All are designed to carry large volumes of motor traffic, and all lie very close to Bank itself. These are the roads that should be carrying through traffic; the area around Bank should, realistically, only be carrying private motor traffic that is accessing the area. Certainly, the Bank junction should not be carrying through motor traffic in an east-west direction, as there are two major roads to the north and south – just a few hundred metres away – that were built for this purpose.
So – why not just try this? Try it now, rather than spending eighteen difficult months building a model from scratch. You’ll get results that correspond to the real world, and much more quickly!