All week, beginning Monday on the way home from work, I've noticed signs of this at the intersection of Laurel Canyon and Sylvan. Literally: the street signs have been covered with new ones. Sylvan is now Cloud St., and Laurel Canyon is something like Mulligan.
The actual filming appears to be behind or in a building just east of Laurel--that side of the intersection is blocked off, and I spotted a camera crew in the parking lot back there this morning.
Nothing really giving away what film or TV show this is for. Not till today.
A new sign is up, with a left-angled arrow and the words Clark County Memorial Turnpike.
Clark County, huh? As in Nevada? Vegas? CSI? Possibly. :-)
Of course, I just googled Clark County and found others in Washington state, Illinois, Ohio, and Wisconsin. But unless this is for a movie, I still think it's gotta be CSI. I'll be keeping my eyes peeled for this location in the last couple episodes of the season.