I had no idea how many miles of road there are in the San Fernando Valley, so I decided to try and look it up. The most recent information I could find is from this 2008 report. It says:
The City of Los Angeles has approximately 6,500 miles of … [paved] streets divided into two geographic areas, Metropolitan (53 percent) and the San Fernando Valley (47 percent). It is the responsibility of the Bureau of Street Services to maintain all streets in a perpetual good to excellent condition.
47 percent of 6,500 is 3,055. I’m sure there are more streets now than there were ten years ago, so let’s call it 3,200. I don’t have any way to figure out what percentage I’ve completed, but it’s not anywhere near that!