Many less important routes lack either business or executive service, or both. Some services have more two or three classes mixed together (executive-business, executive-economy, executive-premium economy, or executive-business-economy). For local or commuter trains, single class service is the most common type of service. But in some areas there may be other classes as well which have different seating arrangement and travel time in which the lower classes has more stops than the upper one. For example, Jogjakarta–Solo route there are "Sriwedari" train services which is air conditioned and has transverse seating and also "Prambanan Express" train which is non air conditioned, has longitudinal seating and more stops. Meanwhile, in Jakarta metropolitan area, there's only one class of service available since mid-2013 which is air conditioned and has longitudinal seating; however, a tradition that started in the mid-90s made it customary for commuter trains to be technically classified as executive-class trains. Commuter trains in Jakarta are operated by Kereta Commuter Indonesia, a subsidiary of the Indonesian Railways Co. From 1872, Japan had a three-class structure for both seating carriages and sleeping carriages. By 1960, as conditions improved on second and third class trains, there were few passengers travelling on first class; therefore, the few remaining first class carriages were rebranded "special" carriages available for hire, and consequently moved Japan's railway system to a two-class system, of which the original second class became the first, and the original third became second. In 1969, the class structure was abolished altogether. The first class was renamed "Green" carriages and the second "Standard" carriages. All members of the Japan Railways Group (JR) offer separated classes of travel, with varying levels of availability on any given train. The Kyushu Railway Company (JR Kyūshū), Hokkaido Railway Company (JR Hokkaido), and East Japan Railway Company (JR East) all offer an enhanced service known as the Green Car on nearly all of their intercity trains. Additionally, the Central Japan Railway Company (JR Central) and Shikoku Railway Company (JR Shikoku) offer a Green Car on some trains, and a few West Japan Railway Company (JR West) trains also have a Green Car. The alternative to Green Car is the Ordinary Car. Although Ordinary Car tickets may be purchased with or without reserved seating, all Green Car tickets are reserved seating.