They're working on the "Texas Triangle" hi speed rail....AGAIN!
DFW down IH35 corridor through Austin to San Antonio.
Then down the IH10 corridor to Houston and back up the IH45 corridor into DFW!
Connecting OKC up the IH35 corridor wouldn't be THAT difficult. Or even Corpus Christi down IH37 out of San Antonio.
This has been a dream since back in the 70's when the three IH (10, 35, 45) corridors were finally completed.