Depends if you want to go interstate for fast or other US and state highways for seeing countryside and small town Texas. We RV a lot and usually go the leisure routes. Winter storms in Texas usually are not like they are in, say, Montana, Michigan, Minnesota etc.
See my #14. I drive west Texas roads a lot and know the speed limits. A couple of years ago the state raised them, and eliminated lower truck speeds and 65 mph nighttime limits.
Looking for fast, good roads, not much traffic....