hedo2002, your response to my statement is absurd.
In 2007, in Tennessee, I was travelling westbound on TN165 going into Tellico Plains at approximately 60 km/h entering town, speed limit is 35 mph so that is pretty much right at the speed limit ... LEGAL. Without signalling or giving any other warning, a car turned left across my path. I knew I was going to hit it the moment the car turned. I left a skid mark from the locked front wheel leading up to the point of impact.
You're suggesting the presence of that skid mark, on its own, suggests "careless driving" on my part? I tried to stop. I couldn't. Given the timing of the situation, there's no way I could have. And for that matter, I couldn't swerve, either. Parked cars on the right (and the car in question was aiming for a parking spot between them). Couldn't swerve to the left because that would have been head-on into oncoming traffic. I was legal. Speed was legal. I did everything I could. Still hit the car.
Back to the incident under discussion. 25 km/h is about 7 metres per second, more than one car length. If the car was going 25 km/h at the time, it could have been as little as one second-ish, maybe a second and a half, between the time that the car was on the side of the road, parallel to the traffic lane but off to the side, and when it was across the road blocking the lanes. If the police officer had pulled that U-turn without looking (which is my contention), then even if Clayton had been at the speed limit he would not have been able to stop in that time.
I've been there. Not going 150 km/h, mind you. But if a car turns across your path, there is no time to react.