Either they are making the seats smaller or the passengers are getting larger! I snapped this picture while in a bus heading back into Ürumqi (Xinjiang Uighur Automomous Region, China). In the vehicle ahead of us, this bull took up the entire seat, and then some. With his rump up on the fence rail and his horns bouncing off the other rail, we assumed there was no room for any other riders! I did not notice anyone volunteering to find out.
(Click on the picture for an enlarged view of the seating arrangement!)