Ethics is two things. First, ethics refers to well-founded standards of right and wrong that prescribe what humans ought to do, usually in terms of rights, obligations, benefits to society, fairness, or specific virtues.
If you mean the average speed limit, it's probably 65 MPH. In 1995 Congress repealed the national speed limit of 55 and it is now up to states again to determine the limits. About 30 states have limits of 70 MPH or higher. A few Western states have no speed limits on certain stretches of highway.
Texas Speed Limits. The Texas State Transportation code Â§ 545.352 defines lawful for speeds for various types of roads. Inside a city or town, 30 miles per hour is assumed to be a safe and lawful speed, unless you are driving in an alleyway. Then, the speed limit is 25 miles per hour. Once you get onto a numbered highway and away from urban and residential areas, the speed limit jumps to 70 miles per hour. On an unnumbered highway outside of an urban district, the speed limit is usually 60 miles per hour. On some parts of Interstates 10 and 20, the speed limit is set even higher, at 80 miles per hour. However, as you've probably noticed by now, there are many instances in which Texas speed limits don't match these default limits.