First of all, I was disagreeing with the metaphor on premise, and thus that it is a 'purely speed based system', because it is not. Emergency vehicles can drive faster, and you can argue with a cop or in court that you had a good reason to drive faster and be relieved of the offense.

If you really believe in only 'the letter of the law' then why do we have courts? It isn't just to determine guilt or innocence, since only some of the courts do that and only some of the time.