The California I-405 actually begins when it splits from the I-5 at the north end of the San Fernando Valley
and stretches to the city of Irvine
where it rejoins the I-5 once more. It is the most heavily travelled freeway in the United States
, with more traffic on it at 2AM than on all the major freeways going through Little Rock, Arkansas
during rush hour.
As the popular song goes, nobody walks in LA.