Tertiary Roads

highway = tertiary:

Tertiary roads are typically the most obvious, widest paths that you will see. These roads are easily seen in the imagery and will seem wide enough for two cars to pass. Tertiary roads connect towns, villages and major streets.

http://i.imgur.com/l2sUktg.png
http://i.imgur.com/dMo7vUe.png
http://i.imgur.com/D9yKOaL.jpg