Colorful Language

Between graduations, family reunions and “I gotta get out of town!” trips, I’ve been putting a lot of miles on the family truckster as of late.

Driving interstates, county roads, city streets and gravel paths, I’ve been advised, guided and warned by signs. Lots of signs. Signs of every color and size, it seems. I got curious, so I checked it out and found out there’s a special language to traffic signs – and you are probably fluent without even thinking about it.

Traffic signs are consistent throughout the U.S. because of a document called the Manual on Uniform Traffic Control Devices. It’s a required reference for traffic engineers, but not something you’d want to take for a read on the beach. The guide is managed by the Federal Highway Administration and the rules within are followed by all public and private roads open to public traffic.

So when I head to visit my bestie in Kentucky, I am assured that the stop signs there will be octagonal with white letters on a red background, just like they are here.

Color is one part of traffic sign language. Here is a list of the official colors and the meaning behind each:

Red – Stop, yield and forbidden actions such as No Parking.

Orange – Temporary traffic control zones and detours. You often see them at work zones.

Yellow – Warning. Think curves, divided highway signs and such.

Yellow-Green – This is a newer color used on all new school-related signs, such as school zone and school crosswalk signs. It can be used for bicycle and pedestrian warning signs, too.

Distance Sign

Green – Informational signs that give directions, distances and place information.

Blue – Services. These signs announce the presence of rest areas, food, hospitals, lodging and the like.

Purple – This color is used on signs intended to help guide drivers who have registered electronic toll collection accounts, such as EZPass. You’ll see these in states with toll roads.

Pink – Incident. This is a newer color in a day-glo hue. It indicates a crash or other emergency condition exists. You’ll likely see this on temporary, fabric signs deployed by emergency services like police or fire crews.

Brown – Features of interest. Brown signs direct motorists to parks, historic sites and similar sites.



Library Sign



Other parts of the MUTCD dictate sign shapes, the type font and case of letters used on signs and other traffic markings. It’s a valuable reference - kind of a grammar handbook and dictionary rolled into one…but I think I’ll grab a nice thriller for my weekend at the lake.

Signal Crews

Just a day on the job -- below are some great shots of signal crews working at Route F and Westminster in Fulton, Missouri. Find the full set here. I wonder how high it really seems up in that bucket!

Have you encountered a flashing yellow arrow yet? 

Those signals sure don't look so big when you're driving, do they?

Timing truly is everything.

Message Boards Play Role in Finding Missing Children

The electronic signs that dot our interstates give you critical travel information every day, from upcoming construction work to wintry road conditions.

They can also help end a parent's worst nightmare.

Under the AMBER Alert Plan, area radio and television stations interrupt regular programming to air information about missing children using the Emergency Alert System. MoDOT's message boards play a part, providing a direct and immediate way to reach the public when time is crucial.

Jan. 13 is National Amber Alert Awareness Day, and the dynamic message boards will note this important day to help build awareness for this essential service.

Since it was created in 1996, the AMBER Alert program is credited with the successful recovery of 492 children, and MoDOT is proud to lend a helping hand. You can find more information, including guidelines for having alerts sent to your e-mail or cell phone, at www.missouriamberalert.com/current.php.

Top Ten for 2009

Making lists is popular this time of year, whether it’s for holiday shopping, a year-in-review list or the things you’re pledging to do (or not do) in the new year.

Topping MoDOT's accomplishment list this year is a drop in highway fatalities for the fourth year in a row. The completion of I-64 and first-in-the-nation status aren't too shabby, either. Watch below to see MoDOT's "Top Ten" for 2009, and send your comments on what you'd like to see in 2010.

Tomorrow's Engineers

Twenty-nine students participated in the 2009 TRAC Summer Conference this summer. TRAC stands for Transportation and Civil Engineering Program, and offers hand-on experience to high school students who may become our future engineers.

One of the activities involved working at a traffic signal to take a traffic count. Students also received an overview of MoDOT and its divisions, and had a presentation regarding the No Zone and how they can stay safe around large trucks. (See the blog post from Aug. 21, "Disappearing Dump Trucks", for an eye-opening video of what the students learned)

Elizabeth Reed, with MoDOT's Equal Employement and Opportunity division, sees TRAC as a valuable opportunity to reach out to students.

"They were given an opportunity to learn engineering concepts and apply them to real-world situations," said Reed. "Hopefully, it will encourage them to become tomorrow's engineers."

A Bright Idea

You pay attention to those bright yellow signs on the road, right? At least the ones telling you about the possibility of a giant rock falling on your car?

Now those signs warning you about a sharp curve, narrow bridge or dead end up ahead will be even brighter.

MoDOT has changed the type of sheeting it uses on the diamond-shaped warning signs to a fluorescent yellow - bolder and brighter than before. So even if you're driving along singing with your favorite radio station, these signs should grab your attention.

They won't all go up at once. As a current sign is in need of replacement, the brighter one will be used. But as someone who has been known to host my own off-key live concert in my car, I appreciate all the help I can get.