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.