Interstate 75 is the state's longest interstate at nearly 192 miles.
Construction on the roadway that spans the state from north to south was completed in 1970.
A sign along the interstate has some of you asking a good question.
Good Question: Frank in Richmond writes: A sign over the bridge over I-75 says no stopping bridge under surveillance. Surveillance by whom?
Everyday thousands of cars drive over the Clay's Ferry Bridge on I-75.
The bridge is massive and the Kentucky Department of Transportation says its an important structure along I-75.
Something that might catch your eye as you drive over it, a sign that clearly reads, "No stopping-bridge under surveillance."
But by who?
The Transportation Department says that after the attacks on September 11th, the Department of Homeland Security received special funding to purchase cameras for monitoring.
Since I-75 is a major corridor through the U.S., it could be a target.
Now cameras that can detect suspicious activity monitor the bridge around the clock in an effort to keep all these drivers safe.
As for who monitors those cameras, its done at the Traffic Operations Center in Frankfort.