In Turin these work really well because there's a 30km speed limit painted right above them in bright white and red, so that drivers surely notice it and unders

In Turin these work really well because there's a 30km speed limit painted right above them in bright white and red, so that drivers surely notice it and understand why they're told to slow down. Also fines, high fines. Making bikes a priority necessarily means making car less important, deal with it.