Because exceptionally slow moving traffic causes congestion and poses an increased risk of accidents. Slower moving vehicles are encouraged to travel on surface streets in order to avoid this.
No. You are also allowed to drive at speeds below the speed limit. Some highways will post a minimum speed in addition to the speed limit, with the requirement that you use four-way flashers if your speed drops below the posted minimum.
Yes, there are freeways in Mexico. See related links for some examples.
No, a speed limit sign typically indicates the maximum speed allowed on a particular road or highway. It does not specify a minimum speed. However, some jurisdictions may have specific laws or rules regarding minimum speeds on certain roads for safety reasons.
A freeway has very few stops and a high speed limits. The arterial roads are side roads that have towns and cities along them. The speeds vary from very slow in town and some what faster between towns but not as fast as freeways.
Some do get posted on Answers.com.
Some motorways require that the vehicles on it have at least 5 horsepower. Other than that, if the Vespa can maintain the minimum posted speed limit, it should be legal, if not dangerous.
On any Interstate highway the minimum speed you can travel is 45 mph. On some highways that were grandfathered into the system it can be as lows as 40 mph. On state roads the minimum speed is always posted if there is one. Otherwise the law states that you cannot drive at a speed that impedes the flow of traffic. That determination will be made by an officer of the law.
Mostly 100kph ( 60 mph ), 110 kph on some freeways. 130kph in the Northern Territory.
Some specialized-use vehicles which are licensed to operate on the public raodways are granted expemptions from minimum speeds. Mobile cranes come immediately to mind, for instance.
The training is performed in the same police department where the hiring process is posted. You will need thought, some requirements as a minimum age, height and the lack of background issues in your personal profile.
North Carolina does not any regulations on the minimum age that a person can enter a bar or pub. Some clubs have individual rules and should be posted on or near the front door.
With no buildings or freeways around, there's probably not many humans around. That way, there's little risk of injury to humans and not much to repair. The Earth will still shake, land slides can occur, trees may topple, and some animals will be injured or possibly even killed.