That $1.06 sounds awfully high, perhaps that is an ending figure based on 54 years of X inflation?
And I have strong doubts that they can start at $.15 per mile for autos, other than in the DFW and Austin areas where there would be a potential for a large number of commuters. The primary funder is probably going to be the trucks, as there are a zillion ways of regs, laws, or incentives that can be used to encourage (require) truck use. Some good, some bad.
The 183-A toll road is 11 miles long and will cost $2 and only 4.5 miles are being tolled to start with. That's quite a bit more than 15 cents. It's being built by Zachery.
All these estimates are just that, estimates (for suckers)