The article falsely assumes that the HOV lane has spare capacity. During rush hour here all lanes are equally clogged, and sometimes the HOV lane is actually slower than the other 4 lanes. The only way to fix LA traffic with current infrastructure is self driving car pools. If/when they can get to the point in which they are safer than normal drivers, and safe for the riders (crime inside of self driving cars) LA tra…
True ride-sharing could also help, and sooner than self-driving cars. Uber and Lyft talked about matching departing commuters in real-time, which would greatly reduce the inflexibility that makes traditional carpooling so unpleasant. I'm not sure why that never took off.
Waiting and hoping that the person who promised to pick you up will actually do so seems annoying and nerve-wracking. "Sorry, boss, I know I'm late again, but a complete stranger was 30 minutes late picking me up today, and then decided to stop for donuts on the way to work."