Safe existing pathways now branded shared use footways, with a white line down the centre and signage.
As for the use of the roads i cycle the roads quite often, and the cycle paths,and see quite a lot of poor driveing and a lot of poor rideing,whatwe need is good education of both parties,better design of roads and junctions,all things Sustrans are trying to achieve.
All things that cant be achieved without funding,which is cheap compared to the cost of a new road or resurfacing new road,a lot of Dual carrigeways could be single tracked each way,with adesignated track running parallel.

