In San Diego, we sat and watched this on the television. My husband shook his head, what a time for I-15 to have to close, on a Friday afternoon when Southern Californians are racing to get up to Las Vegas for the weekend! We figured there were only two or three other ways to get up to Las Vegas -- two of them still used I-15. (One was to take I-5 up to CA-99 in Bakersfield, then head east on CA-58 through Kramer Junction into Barstow, where you catch I-15 north. Another would be to take CA-14 northeast either all the way to Mohave and then turn east on 58 as above. The third way would be to take I-10 out to Blythe and catch US-95 north. Anyway you cut it, though, it was going to add miles and miles.)
Donna