You can never "solve" traffic because the moment more road capacity is available, it will be immediately be filled. Taking the buses out of LAX just make it easier for Uber to drop off. etc. The only way to ensure free flowing traffic inside the loop all the time is congestion pricing.

But public transit option is essential because it is an option. You don't need to be dropped off at in the loop if you are smart and knows taking the APM from ITC is actually faster.