Interstate 70 in Edmundson

Guide signs for traffic leaving Lambert-St. Louis Airport (1981)
Photo courtesy of Michael Summa (taken 1981)

Leaving Lambert-St. Louis airport on Interstate 70, you can see several signal posts painted yellow. This used to be the standard color in Missouri. Also note the button reflectors on the guide signs.

Because this photo was taken in 1981, the towers in the background that look like cell-phone towers definitely aren't for cell phones.