There is no established minimum, only a maximum speed. The minimum speed can be set by local municipalities and must be posted by signs.
The maximum speed limit for police cars varies by state and jurisdiction, but they are typically allowed to exceed the posted speed limit when responding to emergencies.
No it's 55
There is no general answer to this question. It will vary according to the state.
Most states don't have truck speed limits. So in a state like Colorado, New Mexico, Arizona, etc. (where the speed limit is 75), trucks can do the speed limit.
70mph
65 mph
There is no such thing as a "residential highway."If you are speaking of a residential street - the usual speed in urban and suburban areas, unless otherwise posted, is 25 miles per hour.
It varies from state to state. You'd have to specify which state(s) you're referring to.
The same as it is for any other vehicle. Speed limits are set by state governments, and the maximum allowed speeds will vary from state to state.
In Washington State, the maximum legal speed limit on state highways is typically 60 to 70 miles per hour, depending on the specific area and road conditions. The standard speed limit for rural highways is often 60 mph, while some freeways allow speeds up to 70 mph. However, speed limits can vary, so it's essential to observe posted signs.
the state with the highest speed limit is Texas
Typically, it'll be whatever the speed limit of that road is. If there are specific laws on the subject, it'll be a matter of state law, not the FMCSR. You'd need to specify a state for a more accurate answer.