1978-1980[]
1980-Present[]
This logo can be seen on trailers, as trucks have a slightly different variant (Heartland Express doesn't cut across the door on a diagonal). From looking back their social media postings, the logo has been in use since at least 1980.
External Links[]
https://www.facebook.com/HeartlandExp/photos/a.176319289079975/357448574300378- Picture of first logo on a trailer, numbered 16, with a truck 01, having same logo.