Changing the infrastructure is only one part of the issue. Changing the mindset of the population is a whole other, often neglected issue and needs to be addressed holistically and include specific measures for cyclists, motorists, pedestrians, shopkeepers, industrialists, educational establishments, environmentalists, the disabled, media, politicians and others.
It needs to include measures that recognise that there will always be places where the various modes of transport interact, and provide soft measures to make these areas acceptable and safe. Doing that would reduce the number of hard engineering measures needed.