Cycle Infrastructure

There is now a fairly long Department of Transport document up online on "Cycle Infrastructure Design"

It covers when to/when not to segregate bikes from other road traffic, how to do safe cycle facilities, etc.

Two obvious failings
  1. No awareness of mountain bikes. Not only do things like A-frame motorbike barriers get in the way, a lot of their cycle speed calming measures are just a form of entertainment to a mountain bike in a hurry. Hopefully the Bristol Trails Group won't see their recommendations about track surface, minimum distance from trees, etc.
  2. Roundabouts (p58). The document acknowledges their danger, especially those with left-feeds, and discusses how bigger radius roundabouts (e.g. St James Barton, St Pauls/M32 and Lawrence Hill roundabouts) allow cars to get up more speed and are more dangerous. But a key suggestion is "not generally recommended on cycle routes.". Given the data they cite on roundabout design, surely we should be considering -if cycling is to be considered a legitimate form of transport- whether roundabouts should still be being built. After all, if unmanned level crossings are being withdrawn for safety reasons, why can't we have a "no new roundabouts" policy. It may seem ambitious, but round-is-bad.
[photo: a shopping centre with overflowing bike parking. Clifton Down, not Cabot Circus]