Interesting tidbit history on former Route 268, created in 1964, deleted in 1970. I happened to pick up an old CHPW while watching TV. Saw the following (this is from the nov/dec 66 issue): Construct Mulholland Drive (Route 268) as a four-lane scenic highway between Topanga Canyon Blvd (route 27) and Sepulveda Blvd (Route 1), a distance of 8.9 miles. Eastimated cost, $8.300,000 of which the state will pay $5,810,000 ($2,000,000 in the 1966-67 fiscal year) and the city the balance.
Not withstanding the fact that Sepulveda wasn't route 1 (in 1966, it wasn't even a state highway, as the 405 was open, but it might have been unrelinquished 405, or LRN 158), and Route 1 was actually PCH -- in the other direction, towards and beyond Malibu, I wonder how far they got on the actual design of this? Depending on the direction, just imagine the interchange with either Route 14 near Reseda, or Route 64 near Malibu Canyon.