This all depends on where you are in the world. Some will say Left, other will say Right. This question needs to be more specific on what region you are talking about.
the widest road is in Brazil. 160 cars can drive side by side
Yes. Yes, drivers in Ireland (North & South) drive on the left. The only difference between the two are the road signs. The signs in the Irish Republic use kilometers (metric) for distances and speed limits, while the signs in the North (UK) use miles (imperial).
yes but they drive on the right side of the car
Cars in France are left hand drive (traffic drives on the right hand side of the road)
The Spanish as most people in the world, drive on the left side of the car, the countries thaT drive on the right had side are UK, Japan, Hong Kong, Australia, and maybe two or more, but in Europe every one drives on the left hand side of the car.
In US cars (which drive on the right), the right side of the car is the passenger's side. In the UK and other places (where they drive to the left), the right side is where the driver sits.
it varies between country, city, state.
People drive on the left in England and typically the cars are right hand drive.
Cars in Northern Ireland drive on the left hand side of the road.
Italy drives many cars but a few are - ferrari,lamburgini,and these cars are usually drivin on the left side
Actually, cars don't drive. People drive cars.
In Italy, people drive on the right side of the road. So cars made to be used in Italy - or any other right-side-traffic country - have the steering wheel on the LEFT side, to put the driver closer to the middle of the road. The only regular exception are cars imported from left-side markets and some delivery vans etc.