I-15

I-15 is a minor character in EBCGD.

Revenge of Rancho Drive
Wilbur Clark D.I. Road jumped over him, aggravating him.

US-95/US-93/I-515
He was strolling with US-93 to Las Vegas, excited by the city's legal gambling. They pass US-95, creating an exit complex called the Spaghetti Bowl, and the US-93 is transferred to the US-95 and the I-515. He isn't seen since then.