Significant reductions in the number and severity of road casualties: hit by a car at 20mph 1 in 40 pedestrians would be killed; at 30mph 1 in 5 would be killed!
Lower levels of emissions and pollution
Reduced traffic volumes and easier traffic flow
Safer school runs (Britain has one of the lowest levels of children walking or cycling to school in Europe)
A quieter, calmer, safer environment for everyone, especially vulnerable road users, such as children, disabled and elderley people