What states have a 75 mph speed limit?

I'm curious to know, could you tell me which states in the United States have a speed limit of 75 miles per hour (mph) on their highways? Are there any specific regions or characteristics that these states share? Are there any safety concerns associated with such a high speed limit? Additionally, have there been any recent changes or proposals to adjust the speed limit in these states? I'm interested in understanding the rationale behind setting such a limit and how it affects drivers and road safety.