Some of the western US states used to have no upper speed limits, but they no longer do. In order to accept Federal Highway Funds they had to come into compliance and establish upper limits to the speed allowed on their highways.
Yes all states in the US have speed limits. Each state as a speed limit cap, which is the highest a speed limit can be set. Texas has a speed cap of 80 but 85 on specified segments of road. About half of the states in the United States have speed limit caps of 70 MPH.
Believe it or not there once was a time in the US where there was a national speed limit of 55 MPH, this was called the National Maximum Speed Limit (NMSL), this was a provision of the 1974 Emergency Highway Conservation Act. In mid-December of 1987, a bill was passed to raise this national speed limit to 65 MPH, then on December 8th, 1995, the law was repealed returning the posting of speed limits to the authority of the states.
I dont know about each state but i know the highest speed limit is 80 mph and it is usually in states in the west like Texas and Utah. Most North eastern states have a lower speed limit with the exception of Maine (there you can drive 75 mph). In Hawaii the highest is 60 mph. in New York, Pa, Virgina, New Jersey, and others states around there it is 65 mph. California is 70 mph. I am not gonna name the rest because there is so many but check this link out it has a map that shows you the max speed limit in every state below.
No, not all 50 states raised the speed limit in 1987. The increase in speed limits was the result of the National Maximum Speed Law being repealed in that year, allowing states to set their own speed limits. Some states did choose to raise their speed limits, but not all 50 states implemented higher speed limits in 1987.
Local, state and Federal. Federal is the highest, but all of them have their own powers reserved to them. Ex: States can decide whether they'll allow gay marriage, speed limits, ect.
states
~It slows you down. ~Burns more energy. ~Limits the highest speed you can achieve.
The federal government sets national speed limits by promising monetary incentives to states that cooperate with their legislature. The states can set their own limits but if they want aid from the federal government they must comply with their mandates.
Interstates and other main roads of the like which have the highest posted speed limits.
The average speed from New York to Washington DC is 43MPH which hasn't change in the last 25 years. That should give you a idea of the Interstate avg speeds. One must account for traffic, road condition, normal congestion in high traveled areas. 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.
Yes they have gone up marginally after the new speed limit came in .
Speed limits aren't in the Constitution. If you wanted to really reach you could say the 10th--any powers not reserved to the federal government devolve to the states--but that would be a big stretch.
In the United States their is no limit, but in other countries their are limits on speed and power.
Parts of the German Autobahn do not have posted speed limits.
That varies between states, who have jurisdiction to set speed limits in their respective state.