They created a lane that went south in the morning and north in the evening.
The only problem is that in order to make absolutely certain that no car went the wrong way at the wrong time, they had to surround it with lots of concrete with lots of controls for ingress and egress.
Basically they created a two-lane wide lane that went in only one direction.
They could have saved a lot of money and hassle if they had just added a new lane to each side of the freeway.
What idiots!
They're doing similar in Atlanta with new "express" toll lanes being added. What Atlanta really needs is a bypass that is truly a bypass - that is, extremely limited local access so that all the traffic that passes through to get to areas south or north doesn't have to put up with the daily crawl that is rush hour in ATL.