80
70
70mph on some rural interstate highways
The highest speed limit on the Interstates is 75 MPH.
69
There is no general answer to this question. It will vary according to the state.
55 miles per hour.
wrong.
70 mphAdditional: Use caution when applying this answer to your own state. This sounds like the un-posted maximum on Interstates or main arterial rural highways. I seriously doubt that 70 MPH is the allowable maximum EVERYHERE in a rural area.
70 mph - but some states do not allow that speed.
70 mph - unless otherwise posted.
The maximum speed limit in Florida is 55 mph, except where otherwise posted. Speed limits are 70 mph on some rural interstate highways.
70 mph - unless otherwise posted.