A while back, I had written an article about the introduction of new
Express Lanes to the I-110 freeway in Los Angeles County. At first, converting the carpool lanes on the I-105/I-110 connector I-110, and I-10 seemed to be a good idea. The express lanes were created to supposedly help increase the flow of traffic across the general purpose lanes by allowing solo drivers access to the high occupancy vehicle (HOV) lanes for a price, or carpools for free. In order to gain access to the express lanes as a solo driver or carpool, you would need to purchase a FastTrak transponder. Upon entering the lanes, a solo driver would also be assessed a toll based about distance traveled and the amount of traffic at the time you are using the lanes. Carpool and vanpools just have to flip the switch on their transponder to "carpool" to access the lane for free. The express lanes were also designed to encourage more people to use public transit as all public transit vehicles are exempt from needing the transponder or paying tolls.
After personally experiencing what the general purpose lanes have turned into after the express lanes made their debut, I am no longer sure the idea was so good. Sure, carpool, vanpool, and public transportation usage has increased. The biggest advantage to the addition of the express lanes though was the supposed relief the lanes would create for the general purpose lanes. While LA Metro claims average speed in the express lanes have stayed above the proposed 45 mph, the average speed in the general purpose lanes has actually decreased. The reasoning behind this slow down is actually quite simple: people do not want to pay to access the express lanes and are being forced into the general purpose lanes. If you look at page seven of LA Metro's
February 2013 I-110 performance update, you will see that even their own study indicates that speeds have decreased since the introduction of the express lanes. While the speed decrease is not significant, the addition of the express lanes is having the opposite effect from what was desired.