At the height of the killings, 420 Children were killed per year: that is more than 1 per day. 3200 people were killed per year if you include adults. You can imagine that even more were wounded and maimed.
Of course people did not accept that the automobile would destroy their traditional lifestyle and massive protests took place around the country.
It was a bit of a shock cycling in the UK but to be fair all roads were a lot less busy back then. I also don't recall the hostility to cyclists back then that exists now.
A bunch of Dutch hydo-engineers probably (there were rather a lot of skilled folk over there) assisted Somerset back around C17+ to drain and reclaim some pretty large tracts of land in the "Levels". Perhaps we need some cycle lane building assistance.