The increasing posted speed limit phenomenon

[Joe Camper]

What is currently the highest posted speed limit in the country. I've seen 80mph. I bet there's higher isn't there?? Where?

[Gil_J]

Joe,

The highest posted speed limit I've seen with the bus is 75; posted by Michelin. Otherwise, 85 in TX.

[travelite]

Just got back from our 4500 mile, four week, summertime bus trip. I saw 80mph in Wyoming.

[Joe Camper]

I think I heard of a toll road in south Texas that is posted 90mph. Is this true??