Which vehicles are permitted to enter a freeway?

1. Only private motor vehicles.
2. Every motor and non-motor vehicle.
3. Correct answer: A motor vehicle which is permitted and capable of driving at the speed that is indicated on the road sign.
4. Every motor vehicle, except for heavy trucks which might disturb traffic due to their low speed.

WhyOnly motor vehicles that are allowed on it and can go at least the minimum speed shown on the sign may enter an expressway. Slow traffic and anything non-motorized, such as bicycles and carts, may not.