I checked on my log file this morning, and found...
Unknown region/highway combo in line: TX TXLp354 TXLp12/Spr482 I-35ETexas Loop 354 is no longer in the HB, and I can't find any documentation for its sudden disappearance. Admittedly, it's not very well signed throughout Dallas (unusual for Texas), but it seems to have
overhead signs denoting it. I saw another overhead sign last November, but GSMV is not playing nice with slow hotel internet.
TxDOT shows it as active, though truncated back in 1991. (Please move thread appropriately, thanks!)