The way I see it on Google Maps I 15 and I 215 Intersect outside Anaheim CA. Huh, they also intersect outside Vegas...Go figure.
I-5 Runs right through Anaheim essentially. I-15 doesn't get any closer to Anaheim than Corona which is roughly 15 - 20 miles east of Anaheim. Go east one state and follow I-15 north from Corona. ohhh....I see it now....there IS an I-215 running north/south from Temecula to Riverside. Sorry...that's not it. Follow my instructions above. It'll all make sense. And at this point, it's a joke gone bad!
Sorry for ruining it, but seriously what the hell are the chance that two states right next to each other would have the same numbers intersecting with the same freeway.