ST. CLOUD - We all drive by billboards pretty much every day.  Sometimes it looks like they change overnight.  So how are billboards made and changed?  WJON's Jim Maurice looks at billboards in this week's "Behind The Scenes" story.

To find out more about the making of billboards we talked with Tony Griffen and the rest of the staff at Franklin Outdoors in Clearwater.

Every billboard starts with the designers creating an image for their clients on a computer.

Once it's approved, the designer sends it to what amounts to a giant computer printer which puts the image down on a large vinyl tarp.  Workers then trim it, create a pocket around the edge, and do other prep work before it's taken out to the billboard site.

Griffen says they watch the weather when they schedule installation, with windy days the worst.  Two man crews can usually install a new billboard in as little as 15 minutes, with special attention given to make sure the tarp is stretched and that no wrinkles are showing.

Franklin Outdoors has some billboards that will stay the same for 2-5 years, but they also have others that rotate much more frequently about every 1-2 months.