Quick Road Sign Facts
State Highway
- Roads with Route Numbers are owned and maintained by the State Highway Administration.
- Odd Numbered highways run north and south.
- Even numbered highways run east and west.
Interstate System
On the interstate system, any 3 digit number beginning with an even number like I-495 and I-695 will travel in a circle around a metropolitan area and return to the main thoroughfare.
Road Lines
- Yellow road lines are always on your left when driving. They are used to separate traffic.
- Solid white edge lines mark the pavement to the right, "Keep White on Right".
Sign Colors
- Construction and Maintenance signs are orange and black.
- Guide signs are green and white.
- Informational signs are blue and white.
- Regulatory signs are red and white or black and white.
- Warning signs are yellow and black.