Need Help, Buddies car broke down in the middle of an Interstate.

What should he do in this situation hes on interstate 40, he has no roadside services, not mechanically inclined at all. Does Cal-trans have an emergency service? I'm not with him so I can't help directly. I know this is a little off topic in r/cars, but with 300,000 of you guys here I'm hoping we can get some help via /r/cars http://ift.tt/2t7RjKM