After Dru Marland got penalised for cycling too fast, we sent one of our unwitting cyclists down College Road to see what speed cyclists should do down it.
Notice how, although the bicycle was going at the same speed as the car in front, it was still holding up a Volvo XC90, school-run, presumably. This car was forced to overtake the bicycle, which, with the oncoming traffic and narrow gap in front was not an easy move, especially in such a large car.
This is a busy road with a school, Clifton High, just passed on the right, with the parental parking/dropoff zones on either side of the road. Forcing cars to overtake aggressively right in front of a school is a dangerous action and it is selfish for the bicycle to do just that. To make matters worse, the bicycle then immediately swings past the Volvo only to come to a complete halt in front of them. This is a selfish operation that will slow down the important driver whose time is, according to DoT equations, worth more than pedestrians or cyclists.
Clearly then: a bicycle travelling at the same speed as motor traffic speed is going too slow and holding up important people. But going down this road at above traffic speed, as Dru showed, is too too fast. The obvious solution is to ban bicycles from such important roads, namely any road near a school. It is for the safety of them and pedestrians, you understand. Think of the schoolkids!