Failing to slow down Toi ploughed into the back of the car in front of him.
"The force of the impact shunted the vehicle into a motor scooter that was waiting at the lights, throwing the rider off the scooter," the summary states.
As the rider of the scooter fell to the ground Toi's car "rolled over the top of the victim, trapping him".
The rider of the scooter received a fracture to his right clavicular and a large laceration to the right knee.
Toi 's explanation to police was that he was adjusting his radio.
His lawyer said Toi "took his eyes off the road for a second, but that's all it takes".
Judge Rea said the defendant's driving record was appalling and set a bail condition for him to stay off the roads.
Toi will be sentenced near the end of this month.