Other. High speed arterials (50+ mph actual) with no (or very narrow) shoulder and heavy traffic. This feels the most unsafe for me. Seems other cyclists agree 'cause I almost never see any riding on these types of roads. I have to do a couple miles of this if I want to ride to work though.
Peds? What are those?

No peds on my suburban commutes.
Originally Posted by
-=(8)=-
If I had to pick one that is the most unsettling, I would say back roads with lots of blind corners and no shoulders.

I do this on part of my work commute. It's not bad because usually the traffic is much lighter, and speeds lower than the main streets I avoid. Drivers can see me before I enter a curve, and can tell I'm in the center of the lane. Well timed "hold back" hand signals and/or look backs prevent most from trying to pass me while entering a blind curve.