The list of tunnels includes any road tunnel, railway tunnel or waterway tunnel anywhere in the world.
Specifically notable tunnels in the People's Republic of China include:
e.g.:
Road tunnel in operation:
Road tunnel under construction:
Railway tunnel in operation:
Railway tunnel under construction:
No metro, but some long road tunnels, including Hvalfjörður Tunnel at 5.8 km (3.6 mi) and some longer, and the longest (non-road) hydroelectric tunnel in Europe, one of the longest tunnels of any kind in the world, at Kárahnjúkar Hydropower Plant at 39.7 km (24.7 mi)
Road tunnels in operation
Road tunnels under construction
Railway tunnels in operation
Road tunnels in operation
Railway tunnels in operation
Transport in the Czech Republic relies on several main modes, including transport by road, rail, water and air.
For Soviet transportation, see Transport in the Soviet Union.
Transport in Greece has undergone significant changes in the past two decades, vastly modernizing the country's infrastructure and transportation. Although ferry transport between islands remains the prominent method of transport between the nation's islands, improvements to the road infrastructure, rail, urban transport, and airports have all led to a vast improvement in transportation. These upgrades have played a key role in supporting Greece's economy, which in the past decade has come to rely heavily on the construction industry.
Transport in Hungary relies on several main modes, including transport by road, rail, air and water.
Italy has a well developed transport infrastructure. The Italian rail network is extensive, especially in the north, and it includes a high-speed rail network that joins the major cities of Italy from Naples through northern cities such as Milan and Turin. The Florence–Rome high-speed railway was the first high-speed line opened in Europe when more than half of it opened in 1977. Italy has 2,507 people and 12.46 km2 per kilometer of rail track, giving Italy the world's 13th largest rail network. The Italian rail network is operated by state-owned Ferrovie dello Stato, while the rail tracks and infrastructure are managed by Rete Ferroviaria Italiana.
Transport in Poland involves air, water, road and rail transportation. The country has a large network of municipal public transport, such as buses, trams and the metro. As a country located at the 'cross-roads' of Europe, Poland is a nation with a large and increasingly modern network of transport infrastructure.
Transport in Pakistan is extensive and varied. In recent years, new national highways have been built, with the addition of motorways which have improved trade and logistics within the country. Pakistan's rail network is also undergoing expansion in recent years. Airports and seaports have been built with the addition of foreign and domestic funding. Transportation challenges in Pakistan are escalating due to poor planning, inadequate governance, and corrupt practices.
Transportation infrastructure in Romania is the property of the state, and is administered by the Ministry of Transport and Infrastructure, Constructions and Tourism, except when operated as a concession, in which case the concessions are made by the Ministry of Administration and Interior.
Transport in Spain is characterised by a network of roads, railways, trams, air routes, and ports. Its geographic location makes it an important link between Europe, Africa, and the Americas. Major forms of transit generally radiate from the capital, Madrid, located in the centre of the country, to link with the capitals of the autonomous communities.
Switzerland has a dense network of roads and railways. The Swiss public transport network has a total length of 24,500 kilometres and has more than 2600 stations and stops.
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation openings at various points along the length. A pipeline differs significantly from a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
The Gotthard Road Tunnel in Switzerland runs from Göschenen in the canton of Uri at its northern portal, to Airolo in Ticino to the south, and is 16.9 kilometres (10.5 mi) in length below the St Gotthard Pass, a major pass of the Alps. At time of construction, in 1980, it was the longest road tunnel in the world; it is currently the fifth-longest. Although it is a motorway tunnel, part of the A2 from Basel to Chiasso, it consists of only one bidirectional tube with two lanes. With a maximum elevation of 1,175 metres (3,855 ft) at the tunnel's highest point, the A2 motorway has the lowest maximum elevation of any direct north-south road through the Alps.
The Fréjus Road Tunnel is a tunnel that connects France and Italy. It runs under Col du Fréjus in the Cottian Alps between Modane in France and Bardonecchia in Italy. It is one of the major trans-Alpine transport routes between France and Italy being used for 80% of the commercial road traffic.
Transport in England includes road, rail, air, and water networks.
The A 4 is a Portuguese motorway with a length of 63 kilometres, running from Matosinhos to Amarante, where it narrows to become an IP road, signed as IP4 .
The Belgrade bypass or Belgrade city road bypass is a U-shaped, 78-km long motorway partially encircling the city of Belgrade, the capital of Serbia.
The Great Istanbul Tunnel is an under-construction multi-use highway and railway undersea tunnel in Istanbul, Turkey to cross the Bosphorus strait connecting the Europe side and Asia side. It will be the third and the longest tunnel crossing the Bosphorus strait, at a length of 6.5 km, surpassing the Eurasia Tunnel at 5.4 km and the Marmaray Tunnel at 13.5 km.
The Meseș Tunnel is a future automotive tunnel located near Zalău, in Sălaj County, Crișana, Romania, which is planned be part of the route of the A3 Transylvania Motorway, specifically the Poarta Sălajului - Zalău segment (12,9 km). It is named after the Meseș Mountains, the mountain range belonging to the Apuseni Mountains, which forms part of the Carpathians. When completed, it will be the longest road tunnel in Romania, being 2.89 kilometres (1.80 mi) long,