Transport in Indonesia
Indonesia's transport system has been shaped over time by the economic resource base of an archipelago with thousands of islands, and the distribution of its more than 200 million people concentrated mainly on a single island, Java. All modes of transport play a role in the country's transport system and are generally complementary rather than competitive. Road transport is predominant, with a total system length of around in 2008. The railway system has five unconnected networks in Java and Sumatra primarily dedicated to transport bulk commodities and long-distance passenger traffic. Sea transport is extremely  important for economic integration, as well as for domestic and foreign trade. It is well developed, with each of the major islands having at least one significant port city. The role of inland waterways is relatively minor and is limited to certain areas of Eastern Sumatra and Kalimantan. The function of air transport is significant, particularly where land or water transport is deficient or non-existent. It is based on an extensive domestic airline network in which all major cities can be reached by passenger plane. Water transport. Merchant marine vessels. Because Indonesia encompasses a sprawling archipelago, maritime shipping provides  essential links between different parts of the country. Boats in common use include large container ships, a variety of ferries, passenger ships, sailing ships, and smaller motorised vessels. The traditional wooden pinisi vessel is still widely used as the inter-island freight service within Indonesian archipelago. Main pinisi traditional harbours are Sunda Kelapa in Jakarta and harbour in Makassar. Frequent ferry services cross the straits between nearby islands, especially in the chain of islands stretching from Sumatra through Java to the Lesser Sunda Islands. On the busy crossings between Sumatra, Java, and Bali, multiple car ferries run frequently twenty-four  hours per day. There are also international ferry services between across the Straits of Malacca between Sumatra and Malaysia, and between Singapore and nearby Indonesian islands, such as Batam. Ferry services are operated by state-owned ASDP Indonesia Ferry and several private operators. A network of passenger ships makes longer connections to more remote islands, especially in the eastern part of the archipelago. The national shipping line, Pelni, provides passenger service to ports throughout the country on a two to four week schedule. These ships generally provide the least expensive way to cover long distances between islands. Smaller privately run  boats provide service between islands. On some islands, major rivers provide a key transportation link in the absence of good roads. On Kalimantan, longboats running on the rivers are the only way to reach many inland areas. Waterways. Indonesia has 21,579 km of navigable waterways (), of which about one half are on Kalimantan, and a quarter each on Sumatra and Papua. Waterways are highly needed because the rivers on these islands are not wide enough to hold medium-sized ships. In addition to this, roads and railways are not good options since Kalimantan and Papua are not like Java, which  is a highly developed island. With the current length of waterways, Indonesia ranked seventh on the countries with longest waterways. Ports and harbours. Major ports and harbours include Bitung, Cilacap, Cirebon, Jakarta, Kupang, Palembang, Semarang, Surabaya, and Makassar. Ports are managed by the various Indonesia Port Corporations, of which there are four, numbered I through IV. Each has jurisdiction over various regions of the country, with I in the west and IV in the east. Port of Tanjung Priok in Jakarta is the Indonesia's busiest port, handling over 5.20 million TEUs. A two-phase "New Tanjung Priok" extension project  is currently underway, which will triple the existing annual capacity when fully operational in 2023. In 2015, ground breaking of the strategic North Sumatra's Kuala Tanjung Port has been completed. It is expected to accommodate 500,000 TEUs per year, overtaking Johor's Tanjung Pelepas Port and could even compete with the port of Singapore. Roads and highways. A wide variety of vehicles are used for transportation on Indonesia's roads. Bus services are available in most areas connected to the road network. Between major cities, especially on Sumatra, Java, and Bali, services are frequent and direct; many express services  are available with no stops until the final destination. Intercity bus. The intercity bus service has become the major provider of land transportation service connecting Indonesian cities, either within an island or inter-island connected through ferry crossings. The intercity bus operator companies are called P.O. ( in Indonesian) with several major companies operating mainly in Java and Sumatra. The longest intercity bus service in Indonesia is a route operated by P.O. Antar Lintas Sumatera (ALS) connecting Medan in North Sumatra and Jember in East Java. It is a week long bus travel covering a distance of 2,920 kilometers. The surge  of intercity bus travel in Indonesia took place after the completion of Trans-Java highway section connecting Jakarta and Surabaya in 2018. During this time, some intercity bus services began operating fleet of double decker busses. City bus. Some major cities has urban transit bus service, or a more sophisticated form of bus rapid transit (BRT). There are usually also bus services of various kinds such as the Kopaja in Jakarta. The largest one, Transjakarta system in Jakarta, is the longest bus rapid transit system in the world that boasts some in 13 corridors and 10 cross-corridor routes and  carrying 430,000 passengers daily in 2016. Other cities such as Yogyakarta (Trans Jogja), Palembang, Bandung, Denpasar, Pekanbaru, Semarang (Trans Semarang), Makassar, and Padang also have BRT systems in place without segregated lanes. Taxis and autorickshaws. Many cities and towns have some form of transportation for hire available as well such as taxis. Many cities also have motorised autorickshaws ("bajaj") of various kinds. Cycle rickshaws, called "becak" in Indonesia, are a regular sight on city roads and provide inexpensive transportation. They have been blamed for causing traffic congestion and, consequently, banned from most parts of Jakarta in 1972. Horse-drawn carts  are found in some cities and towns. Ridesharing companies have become serious competition to both taxicabs and motorcycle taxis ("ojek"), with the four providers being Gojek, Maxim, Anterin, Grab and others. Minibus. In more remote areas, and between smaller towns, most services are provided with minibuses or minivans ("angkot"). Buses and vans are also the primary form of transportation within cities. Often, these are operated as share taxis, running semi-fixed routes. Private cars. Due to the increasing purchasing power of Indonesians, private cars are becoming more common especially in major cities. However the growth of the number of cars  increasingly outpaces the construction of new roads, resulting in frequently crippling traffic jams in large parts in major cities especially in Jakarta, which often also happen on highways. Jakarta also has one of the worst traffic jams in the world. Indonesia has been gradually introducing an Intelligent Transportation System (ITS) since 2012. ITS Indonesia was formed on 26 April 2011. National routes. Indonesia has about of paved highways and of unpaved highways ( estimate). Four of Indonesia's main highways are classified as parts of Asian Highway Network: AH2 section in Java and Bali, AH25 and AH151 in Sumatra, AH152 in  Java and AH150 section in Kalimantan. Some of them has been numbered, currently only in Java and (partially) Sumatera. National routes of Indonesia pass through the hearts of most main cities, and are designed to connect between city centres. They act as main inter-city route outside the tollways. A national route has to be passable by logistic trucks, while simultaneously handling the common traffic. National routes in Java are numbered, while those outside Java aren't. In some cities, even in crowded districts, national routes often form bypasses or ring roads (Indonesian: "jalan lingkar") around the city to prevent  inter-city traffic entering the city center. Ministry of Public Works and People's Housing is responsible to these networks, except DKI Jakarta part from Jakarta Inner Ring Road to Jakarta Outer Ring Road. A national route can be revised if it serves unable to handle the traffic. It would usually be handled by the province/regional government. Below were lists of some national routes in Indonesia: Toll roads. All expressways in Indonesia are toll roads, known locally as (lit. toll road). The first expressway in Indonesia is the Jagorawi Toll Road, opened in 1978. Over of expressways opened during  the first term of President Joko Widodo, surpassing previous administrations. Since 2018, all expressways do not accept any cash tolls; all tolls must be paid with certain contactless bank cards. The high cost of building and maintaining a national highway system means that Indonesia has to outsource the construction and maintenance to private and state-owned companies. Indonesia has an extensive system of highways consisting of: Lesser Sunda Islands. Serangan-Tanjung Benoa Toll Road: The toll road between Tanjung Benoa to Airport and from Airport to Serangan, all in direct line (not curve) is 12.7 kilometres and is equipped also  with motorcycle lanes. The toll road is formally opened on 23 September 2013, about a week before APEC Summit in Bali is opened. Railways. The majority of Indonesia's railways is located on Java, used for both passenger and freight transport. The railway is operated by Kereta Api Indonesia. The inter-city rail network is complemented by local commuter rail services, particularly in Jakarta metropolitan area and Surabaya. In Jakarta, the KRL Commuterline service carries more than a million passengers a day. Urban rail networks are also exists in few cities. Palembang LRT began operations in 2018, the first of  such kind. The Jakarta MRT and Jakarta LRT began operations in 2019, with the Greater Jakarta LRT system is currently under construction. There are four separate railway networks on Sumatra: one in Aceh, one in North Sumatra (Aceh connection proposed to be finished in 2020s), another in West Sumatra, and the final one in South Sumatra and Lampung. South Sulawesi has railway network in Barru Regency as the impact of Trans-Sulawesi Railway construction, although the network has not been used yet. There are no railways in other parts of Indonesia, although new networks are being developed on Kalimantan, Sulawesi  and Papua. The government's plan to build a high-speed rail (HSR) was announced in 2015, the first in Indonesia and Southeast Asia. It is expected to connect the capital Jakarta with Bandung, covering a distance of around . Plans were also mentioned for its possible extension to Surabaya, the country's second largest city. Pipelines. As of 2013, Indonesia has pipelines for condensate , condensate/gas , gas , liquid petroleum gas , oil , oil/gas/water , refined products , and water . Air transport. Air transport in Indonesia serves as a critical means of connecting the thousands of islands throughout the archipelago. Indonesia is  the largest archipelagic country in the world, extending from east to west and from north to south, comprising 13,466 islands, with 922 of those permanently inhabited. With an estimated population of over 255 million people – making it the world's fourth-most-populous country – and also due to the growth of the middle-class, the boom of low-cost carriers in the recent decade, and overall economic growth, many domestic travellers shifted from land and sea transport to faster and more comfortable air travel. Indonesia is widely regarded as an emerging market for air travel in the region. Between 2009  and 2014, the number of Indonesian air passengers increased from 27,421,235 to 94,504,086, an increase of over threefold. However, safety issues continue to be a persistent problem in Indonesian aviation. Several accidents have given Indonesia's air transport system the reputation of the least safe in the world. Indonesian aviation faces numerous challenges, including poorly maintained, outdated, and often overwhelmed infrastructure, the factor of human error, bad weather, haze problems caused by plantation fires, and volcanic ash spewed by numerous volcanoes that disrupts air transportation. The Indonesian Air Force has 34,930 personnel equipped with 224 aircraft, among them 110 combat  aircraft. The Indonesian Air Force possesses and operates numerous military air bases and military airstrips across the archipelago. The International Air Transport Association (IATA) has predicted that Indonesia will become the world's sixth largest air travel market by 2034. Around 270 million passengers are predicted to fly from and within Indonesia by 2034. Airports. As of 2013, there are 673 airports in Indonesia, 186 of those have paved runways, and 487 have unpaved runways. As of 2013, there are 76 heliports in Indonesia. Jakarta's Soekarno–Hatta International Airport serves as the country's main air transportation hub as  well as the nation's busiest. Since 2010, it has become the busiest airport in Southeast Asia, surpassing Suvarnabhumi and Changi airports. In 2017, it became the 17th busiest airport in the world with 62.1 million passengers. Airlines. In Indonesia, there are 22 commercial scheduled airlines that carry more than 30 passengers, and 32 commercial scheduled airlines that transport 30 or less passengers, as well as chartered airlines. Some notable Indonesian airlines, among others, include Garuda Indonesia, the government-owned flag carrier of Indonesia, Lion Air, currently the largest private low-cost carrier airline in Indonesia, Sriwijaya Air, currently the  largest medium service regional carrier in Indonesia, also the country's third largest carrier, and Indonesia AirAsia, the Indonesian branch of Malaysian-based AirAsia. Mudik. "Mudik", or "Pulang Kampung", is an Indonesian term for the activity where migrants or migrant workers return to their hometown or village during or before major holidays, especially Lebaran (Eid al-Fitr). Although the mudik homecoming travel before Lebaran takes place in most Indonesian urban centers, the highlight is on the nation's largest urban agglomeration; Greater Jakarta, as millions of Jakartans exit the city by various means of transportation, overwhelming train stations and airports  and also clogging highways, especially the Trans-Java toll road and Java's Northern Coast Road. In 2017 it was estimated that the people that took annual "mudik" travel reached 33 million people. The demand for train and airplane tickets usually spikes a month or two prior to Lebaran, prompting an unusually higher cost for tickets for highly sought days of departure. Some airlines might add extra flights or operate larger airplanes to deal with the surge in demand. Indonesian train operator Kereta Api Indonesia usually offers additional train trips or introduces longer trains with more cars in order to  meet the demand. The private operators of intercity and interprovince buses usually charge higher ticket costs during this period. The impact is indeed tremendous as millions of buses, cars and motorcycles jam the roads and highways, causing kilometres of traffic jams each year.