This. I'm my line of work, the first 10 mins could be insane. When my Co-workers show up 15 mins late, I tell them they might as well have not come in. I've gotten in the habit of showing up 10mins early everyday and my job is so much easier. It's not gone unnoticed and I've gotten a major raise this year.

Depends on the traffic. If the job is that important, the company should pay someone to arrive early.