because the wheels are broard
Weight distribution.
so that pressure will decrease and road will not sink
For stability reasons otherwise they would be top heavy and able to tip easily.
Vehicles with four wheels are cars, buses and most carriages. Some smaller trucks also have four wheels. There are bicycles as well as motorcycles with four wheels, but the vast majority of these vehicles are only two-wheeled.
It is because the place through which the bus or truck is moving has a large surface area , as the tires become wider it will be easy to drive.
The rotation of the steering shaft drives the turning of the wheels, and buses and large trucks have wheels which are significantly more massive than cars' and light trucks', requiring more torque on the steering shaft to turn the wheels. The larger steering wheel gives a mechanical advantage in turning the steering shaft; a longer moment-arm from the application of force by the driver on the steering wheel results in a larger torque on the steering shaft from the same force applied.
wheels are used everyday. Cars, bikes, buses, planes and trains. Many forms of transport rely on the wheel. Shopping trollies, trucks, forklifts. Wheels allow heavy weights to roll easily and move.
Yes
Many buses, cars and even scooters do not skid on roads because they are equipped with good traction tires. Public transportation especially is equipped to handle bad weather conditions.
Some buses have 4 some have 6.
Cabover.
Trucks produce more pollution since have more mass, weight, and larger engines than buses.