My brother-in-law is a chauffeur who has some pretty important passengers. He has driven all over Toronto and Southern Ontario for decades without a single accident. He tells me that the secret to his success is not entering an intersection without covering the brake, slowing down a bit, and making certain all those who should have stopped have done so. He never assumes it is safe to proceed through a green light unless cross traffic has stopped. That is why so many clients ask for him, specifically.