I ride a lot late at night... betweem 9pm and 3am. At that time in this small town, I pay almost no attention to stop signs and lights because there is almost no traffic. But, early morning and mid-day rides I will obey the traffic signs when there are other cars around. You definitly have to watch out for the drivers because they aren't watching out for you. Always assume they don't see you and you'll live a little longer.