If your road is the road I think it is, I’ve lost count of the number of times I have been overtaken. And not by boy racers only. By mothers in Range Rovers, by middle aged men, usually giving me a honk on the horn as they do so, only for me to catch up with them in 30 seconds in a queue of cars. The speed problem is easily enforced by police, I think you can request them to come out if there is a problem. Although if they just do it once or twice, it won’t have a lasting impact. Just as the people who got ticketed every day for two weeks on the new yellow lines outside my house kept coming. Individuals might get put off from repeating it but no overall change in behaviour.