Toll tags in Texas (OT)

No, speed limits are speed limits. There is a concept of a recommended max speed of 130km/h on
every highway in the absence of a hard speed limit, though, and if you are having an accident
at higher speed it becomes *your* responsibility in civil court to prove that the accident
would have happened if you had stuck to the recommended speed. On top of that civil courts can
raise damages if your speed just was beyond reason, either in relative terms (fog, rain, etc.)
or absolute (300km/h being considered reckless).