30 v 35mph is not a trivial increase. It's nearly 20% faster. And kinetic energy scales quadratically with velocity. According to a popular UK road safety camp

30 v 35mph is not a trivial increase. It's nearly 20% faster. And kinetic energy scales quadratically with velocity. According to a popular UK road safety campaign, if you hit a pedestrian at 35mph you're 2.5x more likely to kill them than if you hit them at 30mph (50% chance vs 20% chance) https://www.roadwise.co.uk/using-the-road/speeding/the-chance-of-a-pedestrian-surviving/ https://www.roadwise.co.uk/using-the-road/speeding/the-chanc...