Are NorCal Car Pools Lanes Better than SoCal's?

Photo by Skalas2 via Flickr
In today's city council session, there was a big discussion regarding congestion pricing on the 110 Freeway which would basically let non-hybrid solo car uses use the car pool lane for a price. Councilwoman Janice Hahn, who voted for the measure (and it did pass), had a concern about the lanes because they bottleneck, in her opinion, due to the inability to get in and out of the lanes whenever people want to. She wants to look into their current effectiveness.
"I know for a fact that up in Northern California, car pool lanes don't have the double-double, triple-triple, yellow-yellow, white lines," she exclaimed in a confused manner. "In fact, they treat them as just a lane that you can get in and out of. I think that is one of the number one reasons they [car pool lanes in Los Angeles] are not effective right now--is the exit and entrances to these car pool lanes."
Is she correct? Would our SoCal car pool lane woes be solved by stealing ideas from up north?