I must admit that I have some fairly strong views on this. I have cycled in Europe on and off for more than 20 years. In fact Mrs S and I took the children on a cycling holiday through Belgium, Holland and Germany back in 88.
Whilst there is a good network of cycle tracks in Belgium and Holland, this tends to come apart when you reach the cities. Where roads were bulldozed and re-made by the Germans in WWII, the following years has seen excellent cycle management systems put in place. Where, on the other hand, the road systems have remained from before WWII, the situation is quite different. With cycle lanes crammed into roads which were never made to accommodate them.
Where whole families grow up on bikes, cycling sense is instilled from the beginning. But even then teenage hormones and rebellion take off and replace sense with stupidity. But, on the whole, the environment is much more sensible and much safer. Many of the drivers on the road are also cyclists in the evenings or weekends.
Contrast this with the UK. We did not have our towns and cities flattened in WWII. OK London and some of the larger cities were hit. But nothing like war raging over them in two directions. The second time with both sides fighting over land that was not theirs, with corresponding lack of concern to the damage inflicted. So the UK infrastructure has not been built with cycling in mind. You can't just expand roads which have pavement and houses on either side. You can't just take a chunk of the road and give it to a cyclist then expect everyone else to "just deal with it".
Even worse is that cramming the cyclists next to busses and trucks on the same road designed only for vehicles causes even worse proximity and also endows the cyclist with some kind of belief that the white lines they are cycling within are some kind of personal shield which will protect them from danger. God knows what they teach people in schools nowadays but 70kg of flesh and bone travelling at 15mph is always going to lose the argument with 500kg of steel and plastic travelling at 30mph. Or worse, 42 tonnes of steel and plastic.
Then there are the issues with cyclists not having a clue how vehicles have to travel on the road. Take a 22 Ton truck for example. It has a wheel, almost, on each corner. For a truck like that to go round a corner, it must go Past the corner before turning. So the cyclist, hammering to get through the lights, completely ignores the indicator on the truck, sees the front wheels heading past the junction and tries to pass it on the inside. See paragraph above for end result... It's even worse with an arctic of whatever tonnage. Then the truck driver is assumed to have been at fault. Even if s/he got there first, was indicating correctly and doing exactly what should be done. If the cyclist dies, the driver has to live with that and the press will always assume it was the fault of the driver.
A cycle is a road traffic vehicle. That's why you can lose your driving license for riding one drunk. Not because of the damage you can do, but because you are riding a vehicle on the roads whilst intoxicated.
People think that cycling can safely be increased just by painting a few lines and creating some new rules. What they forget is that if we double the number of cyclists on the roads, we will immediately double the number of cycling deaths on the roads every year. This is simple statistics as I tried to point out to a policeman who was ranting on at me about how Linconshire has twice the number of motorcycle deaths that most other counties have. He was not listening to the fact that he should be taking % of motorcyclists. Which was exactly the same.
So if we do have more cyclists, we will suddenly get the press ranting about how many more people are dying on cycles. Which will lead to stupid and draconian restrictions which will make congestion and traffic frustration much, much, worse.
So whilst I would like to see more cycling on the roads, I'd like to see the relationship of education of cyclists to the number of cyclists quadruple.... Or it's just another misery waiting to happen. The parents who simply put no time off to teach their children to ride sensibly, then lose the children to accidents, will always be looking for someone else to blame...