Check with your local DOT. On farm and country roads there may be no problems but in downtown Newark, you might get yourself a ticket.
It is legal to drive a tractor on the highway as long as you are going directly on the side to where you will take it and do your work.
the legal age to drive a tractor on a public road is 16 providing you have a full tractor licence. But you will not be able to drive a two seater tractor or one exceeding 20 tonnes
The legal age to drive a tractor on the road is 16
What kind of a tractor is being asked about. A farm implement or a semi-trailer hauler
80,000 lbs. After that, an oversize permit is required.
Yes.
The legal age in England to drive a motor vehicle is 17. However considering many routes and farmland may be considered as off-road, you could technically drive a tractor at any age, as long as it is off road. From personal experience, a friend of mine gained his license to drive a tractor at 16, and drove tractors immediately after. Therefore the driving of tractors or other farm vehicles may be permitted at a younger age, due to farms being "off-road".
Anybody who fits the legal requirements to drive in that jurisdiction, and has permission from the vehicle's owner, can drive the vehicle.
For anything which is a licensed, road legal vehicle, you need to take a test and obtain whatever class license is necessary for that vehicle, be it Class C/D for your passenger cars, and Class A or B for heavy commercial vehicles.
You need a license to drive any powered vehicle on public roads except farm equipment. They're not legal for road use in NJ
On private property: yes. On public roadways: no.
No.