Reference point? I always preferred World Book Encyclopedia but I don't know if they still make them. Don't put them in front of your vehicle because they may suffer damage.
Vehicle in front of you
Do not exceed the speed limit is correct
VEHICLE SPECIFIC.
15MPH
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.
it is the maximum amount of weight an axle of a vehicle or trailer can carry with out damage. this is sometimes used to determine if an individual has broken the terms of a warranty.
The age limit of a front seat rider is 12. You can find this in the viser above your head.
The best ways to determine speed are to 1)know the speed limit, and 2)
In practice, It is acceptable to increase the speed of your vehicle over the legal speed limit to pass or overtake another vehicle. Legally, it is not permitted. If the other vehicle is already at the speed limit, you should not be passing it. If it were a police car you were passing, at any speed above the speed limit, they could stop you.
The same as it is for any other vehicle. Montana does not have a separate commercial vehicle speed limit, save for mountainous areas of downgrades where vehicle over 26,000 lbs. GVWR will have a lower speed limit indicated in signage.
In practice, It is acceptable to increase the speed of your vehicle over the legal speed limit to pass or overtake another vehicle. Legally, it is not permitted. If the other vehicle is already at the speed limit, you should not be passing it. If it were a police car you were passing, at any speed above the speed limit, they could stop you.
You yourself do not have a speed limit of any kind. Everything else in the universe has the maximum speed of: Your Speed + the Speed of Light. However it is impossible to determine your own speed because there is no stationary point of reference in the universe.