And it could be made ineffective as regional expansion continues. As soon as enough people who are willing to pay the toll saturates capacity you end up with the same issue (“just one more lane bro”). I see this all the time in the DC metro area’s toll express lanes that often save no significant time.
Another effective way to control highway congestion is to get people off of highways and invest in your transit system, make it better than driving so that people don’t drive as often.
But maybe Houston is too far gone for that.
For comparison, the Chicago red line extension project adds 5 miles of heavy rail for about twice the cost, so 4x more per mile. But the Houston toll lane project doesn’t do anything positive for adjacent property values like new rail stations do. Chicago will get money back from more property taxes and the new stations will relieve traffic on the Dan Ryan.
Transit lines get faster as ridership increases due to the ability to increase schedule frequency, the exact opposite of highways.
I am not saying Houston should magically turn into 1800s-era urban fabric but maybe some decent park and ride commuter transit would be a start? There are cities in Texas with 6 figure populations that have NO public bus system.