Passenger coaches are manufactured by nearly all bus manufacturers. Essentially, a passenger coach or passenger bus is a bus that is used to transport passengers. The buses use for public transportation throughout your city are passenger coaches, as are greyhound buses, and tour buses. The term passenger coaches is simply a generic term for buses that are frequently used to transport passengers. Whenever you ride a bus, chances are it is a passenger coach. Of course, the term coach tends to lend an air of sophistication that bus does not, so can always reserve the term passenger coaches for buses that are a bit fancier than your everyday buses.