In the link you can see the different proposed alternatives for what metro is thinking of implementing to get a connection from the San Fernando Valley and the Westide.

My understanding is that there is only a bus line that connects the two, so the current alternative method of travel to a bus is taking the very congested 405 fwy.

An additional link with more detailed information: https://us.planengage.com/sepulvedacorridor/page/execsum