Gentleman,
I was a road tech for many years. the rule of thumb was always give a 1/2 hour each way every day. What surprises me is that many of you are not using a creative billing practice to over come that gap. I know I did! Work 6, get paid for 8, and bill 10 was always my moto. I know with the advent of GPS that has become a little more difficult, but I never new of a company that would give a 95% to 100% biller a hard time. Work hard to earn your place every day. That is what it takes to maintain a good working relationship with the company you work for. They owe you no more than your last pay-check, you owe them no more than your last day worked.