First there is the guide by Cyclenation, written by Cambridge Cycling Campaign ‘Making Space for Cycling – A guide for new developments and street renewals’ (PDF). It’s very well written and makes it very clear what is considered good and bad practise. It makes a good case as to what the various benefits of good cycling infrastructure are, not only for cyclists but also for developers.
In contrast stands the ‘Sustrans Design Manual – Handbook for cycle-friendly design’ . It seems like a random collection of cycling infrastructure and it doesn’t really say what is considered good or bad. It promotes some really bad infrastructure which has come under great criticism from cyclists for example the two point turn junction, saying cyclists should join the main road before a roundabout or 90 degree angles at the end of cycle paths when joining the road. This guide would have been bad a couple of years ago, but in 2014 when even the CTC is promoting SpaceForCycling and segregated infrastructure it seems like a step back into the dark ages.
So please Sustrans – start from scratch or even better just promote the guide by Cyclenation which promotes cycling infrastructure fit for the 21st century.