You can make a new protected bike lane by just throwing a bunch of jersey barriers on the side of a road. It costs (in relative transportation cost terms) almost nothing.
These sort of things would instantly make the roads dramatically safer.
The only reason this isn't done isn't due to cost, but due to political opposition to having any amount of road space removed from exclusive car use.
You can make a new protected bike lane by just throwing a bunch of jersey barriers on the side of a road. It costs (in relative transportation cost terms) almost nothing.
These sort of things would instantly make the roads dramatically safer.
The only reason this isn't done isn't due to cost, but due to political opposition to having any amount of road space removed from exclusive car use.