Call me an old fuddy duddy, but I quite like being the designated driver (or driving to a mates 40 miles away for a catch up, bringing the booze but not drinking it) normally because I'll leave post-midnight sober as a judge, and then the roads are empty and you can really make progress on the way home.
York to Scarborough as a daylight driver? Anywhere between one and a half and two hours depending on the number of 40-mph-everywhere-numpties and the non-overtakeable queues they generate.
Same trip at night. 45mins is easy, but I've heard of people managing it in closer to 30. Presumably they don't have much time for points on their license, and have excellent headlights :-$
It does make the daytime trips seem like horrribly painful affairs though.