Mutant | Night Shadows (1984)
Some roads should only be traveled in the light of day!
Two brothers end up in a small town on their vacation. One of the brothers gets lost and as the other searches he discovers that toxic waste has transformed normal human beings into zombie-like mutants. A nearby chemical plant has inadvertently turned the town into a seething den of bloodthirsty humans, intent on hunting down every last "normal" human to feed upon.