It is my practice to avoid peak traffic times and / or ride low traffic roads. We have a trail 1.5 miles from our house, however the road is just plain more fun. Sometimes I will add a protion of the trail into a 15-20 mile ride, which means taking a mtb. I get a harder workout that way and it is a bit different. I have had a few close calls trying to cross busy roads, due to speeding cars and difficult to see trail crossings. Now that the sun is setting sooner I have taken my evening exercise into a sub-division, which does get boring but has some hills and very little traffic. I am very aware of the sun-glare problem with our early evening sunsets and a bit more cautious about being seen.