Which vehicle classification includes all types of buses used for public transport?

The classification that includes all types of buses used for public transport is indeed commercial vehicle. This classification is specifically designated for vehicles that are used primarily for transporting goods or passengers as part of a business or commercial enterprise. Buses designed for public transportation fall under this category because they are operated by transit authorities or private companies to serve the public, reflecting their primary purpose of carrying multiple occupants as part of a paid service.

Passenger cars, while they do transport individuals, are typically classified based on their use as private vehicles for personal transport rather than commercial purposes. Special mobile equipment refers to vehicles used for specific jobs or tasks that don't primarily involve passenger transport, such as construction equipment. Motor vehicle is a broad category that encompasses all vehicle types but does not specifically identify those primarily used for commercial purposes. By focusing on the intent behind the vehicles' use, commercial vehicle clearly encompasses the category of public transport buses.