You wasted your time bro. You should pick 1B and go straight to East Canterbury, then keep repeating. It takes 40 seconds (or less), which is easily 4050 per hour
Or you could take the 2nd exit at the initial roundabout, and go straight up until you make it past the school, and turn left. Simple, easy, half the time and the same points. Plus for the most part its one straigh road. With that you can earn 3600 points per hour.