Typical rural highway speed limits:
80 km/h on all undivided highways built to standards less than A2 specifications (lower limits down to 60 km/h should be expected on sinuous roads)
80 - 110 km/h on A2 undivided highways, which have wide shoulders intended to facilitate passing (and therefore function as 3- or 4-lane highways) and grade separation at major highway junctions
100 - 110 km/h on most divided expressways and freeways, with a few rare exceptions allowing 120 km/h
The general flow of traffic usually far exceeds the posted speed limit, but care should always be taken at curves (lower speeds are implied but not always posted), industrial areas (commercial vehicles often travel at well below the speed limit), and hills (oncoming traffic may be passing a slow vehicle on an uphill).
Speed bumps, which vary from asphalt or cement ribs to Bott's dots, are widely employed to reduce traffic speed at built-up areas, school zones, dangerous curves, and the like. Some are painted and/or signed, while others are not. Car insurance usually does not cover damage to the undercarriage of the vehicle due to taking a speed bump at excessive speed.
Slower traffic should ALWAYS keep right. Even on undivided roads, common courtesy dictates that the slower vehicle should drive on the shoulder (if any) to allow faster traffic to pass. If your vehicle requires driving much slower than the flow of traffic, driving on the shoulder is acceptable to allow two lines of traffic to freely pass.
It all depends on the road, the speed limit is usually between 10-60mph.
75
50
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.
one hour if you go the normal 55-65mph speed limit
If they have you on Radar, they might let you off if they choose to with as much as two miles over the posted speed.
826 limit
the posted speed limit
When another speed limit sign is reached that changes the limit from the previously posted one.
The speed limit is exactly that - the speed limit. While a reasonable excess of speed might be overlooked when overtaking another vehicle, there is no guarantee. You can be pulled over and cited for speeding, still.
The posted speed limit is the max speed.
In the UK the speed limit comes into force as soon as you pass the speed limit sign. As such the distance is zero as you should have slowed down to the posted speed limit before passing the sign.
The humps do not affect the speed limit. The speed limit is determined by other rules and signs.
Whatever the posted speed limit is.