Speed wouldn't be an issue in this country if people actually drove properly and we all followed proper protocol with merging, lane changes etc. No passing on the right etc.
Wales/England.. 50 MPH is the limit ON WINDING SINGLE LANE HEDGE ROW LINED goat trails. 70 MPH is a suggestion on the M4/ M5.. other than the video speed traps that are all in the GPS data base that beeps at you when entering. Traffic on the multilane flows lovely... everyone in the slow lane.. out to pass and back in. No weaving.. or slow folks in the rail lane etc. Saw very few damaged cars over there. Picked up in Manchester by my brother's buddies wife. On the M5 and I glanced at her speedo of her Nissan SUV and thought to myself.. we're going along pretty good for 88 ! Then I saw the MPH in big letters.. KPH in small ! The norm and a non-issue over there.