"A factor that courts should bear in mind in determining the sentence which is appropriate is the fact that it is important for the courts to drive home the message as to the dangers that can result from dangerous driving on the road. It has to be appreciated by drivers the gravity of the consequences which can flow from their not maintaining proper standards of driving. Motor vehicles can be lethal if they are not driven properly and this being so, drivers must know that if as a result of their driving dangerously a person is killed, no matter what the mitigating circumstances, normally only a custodial sentence will be imposed. This is because of the need to deter other drivers from driving in a dangerous manner and because of the gravity of the offence."