This is one of the most traveled corridors in the united states. The nearby expo line is a light rail and already reaches capacity, and already runs at the maxi

This is one of the most traveled corridors in the united states. The nearby expo line is a light rail and already reaches capacity, and already runs at the maximal headways possible with the built infrastructure. Heavy rail is the only transit technology there is to serve the capacity needs of the sepulveda route especially once it extends further south in the future and links directly with the expo line or even down to LAX and beyond.