Are you on a road bike or MTB. The MTB should be able to handle moving to an unpaved shoulder. ALWAYS ride with traffic. Get a rear view mirror. The sense of security it gives because you can see cars coming is awesome. Mine is a barend mirror on an MTB. Gives an great view behind me. Actually works better than the ones on my motorcycle. Blinkies, lights and reflective clothing will solve nighttime issues. Some rural highways around here with a posted 80-90 kph (50-55mph) have a small paved section just to the right of the whiteline down highway edge. It varies from 6" to 1.5". 6" is all I need to feel safe. Heavy semi rigs are an issue. There is not enough room for two trucks and a bicycle without a large paved shoulder.