I commute on heavy traffic roads where I have to merge to turn, lovely suburb streets, portions of 55mph highways. I feel safer on the highways than I do on the streets.

Listing them in my comfort zone would be highway, suburbs, streets. People seem more in a hurry on streets and less in a hurry in the burbs. People on the highway are only concerned with the cars around them so I figure that they are more aware and less of a threat.

I agree, you cannot plan on becoming street grease. Mitigate your damages, increase your profile, and be aware.