In the United States, the majority of right-hand drive (RHD) cars are considered to be on the left side of the road. This is because the United States follows the right-hand traffic rule, where vehicles travel on the right side of the road. Therefore, RHD cars, which are designed to be driven on the left side of the road, are positioned on the left side when viewed from the driver's perspective.

This configuration is due to the fact that RHD cars are designed with the steering wheel on the left side, which allows drivers to easily reach the controls while driving on the left side of the road. When these cars are imported into the United States, they are typically fitted with a left-hand drive (LHD) conversion kit, which involves swapping the steering wheel and pedals to the right side. However, the overall layout of the car remains the same, with the driver's seat and controls on the left side.

Data from the United States Department of Transportation (DOT) shows that as of 2020, approximately 95% of all vehicles registered in the United States are RHD. This high percentage is primarily due to the fact that many vehicles are imported from countries where RHD is the standard, such as Japan and the United Kingdom. These countries have a long history of producing RHD vehicles, and the United States has been a significant importer of these cars.

The preference for RHD cars in the United States can also be attributed to the fact that many American drivers are accustomed to driving on the left side of the road, as a result of their experience with RHD vehicles from other countries. Additionally, RHD cars are often perceived as being more fuel-efficient and having better handling characteristics due to their design.

In conclusion, RHD cars are positioned on the left side of the road in the United States, as they are designed to be driven on the left side and are commonly imported from countries where RHD is the standard. The high percentage of RHD vehicles in the United States is a reflection of the country's significant import market and the preferences of American drivers.