Lost Brindle Dog Spotted Near I-80, Iowa!

Medium sized dog with a brindle coat and orange coat. Unfortunately I was not able to get the dog as he seemed scared and ran away from me. I saw him first along I-80 on the east bound side between the on ramp and the highway. He crossed to the other side of the highway and I followed him down Atalissa rd where he ran into a field and ran east towards the wooded area. Hopefully this helps narrow the search