This freeway was built with a great deal of controversy. Lawsuits were filed, compromises made, parts were not built, but it was finally completed in 1993. The three most noticeable compromises that were made are the Metro Green Line down the median from I-605 to I-405, the lack of a connection to I-5 in Norwalk, and the fact it is a six-lane + 2 HOV lane freeway. Overall, it is a decent freeway, more should have rail lines down the middle like this one, but it does get heavy traffic.
This is one of the few freeways in Los Angeles to have meters on the connector ramps.