Don't be distracted by mobile phones, changing the CD in your car or by taking your eyes off the road to pick up things or deal with children, she said.
"Keep vigilant and aware of what is going on around you."
Meanwhile, the teenage driver will receive infringements for her driving but won't be charged in relation to the crash, said Ms Johanson.
Police could better deal with her rather "than tying up the court system", she said.
Motorists are also reminded that on December 1 the alcohol drink-driving limit is dropping from 400mcg to 250mcg for breath and from 80mg to 50mg for blood.
The alcohol limit for drivers aged under 20 remains at zero.