Lærdal Tunnel is a 24.51-kilometer (15.23 mi) long street passage associating Lærdal and Aurland in Sogn og Fjordane, Norway and spotted pretty nearly 175–200 kilometers (109–124 mi) north-east of Bergen. It is the longest street burrow on the planet succeeding the Swiss Gotthard Road Tunnel. The passage conveys two paths of European Route E16 and speaks to the last connection on the new primary thruway associating Oslo and Bergen without ship associations and troublesome mountain intersections amid winter.
In 1975, the Parliament of Norway chose that the fundamental street in the middle of Oslo and Bergen would run by means of Filefjell. In 1992, Parliament affirmed that choice, settled on the further choice that the street ought to gone through a shaft in the middle of Laerdal and Aurland, and passed enactment to fabricate the passage. Development began in 1995 and the shaft opened in 2000. It cost 1.082 billion Norwegian krone ($113.1m USD).
Design & Safety -
An aggregate of 2,500,000 cubic meters (3,300,000 cu yd) of rock was expelled from the passage amid its development from 1995 to 2000. The passage starts simply east of Aurlandsvangen in Aurland and experiences a mountain range and finishes 5.5 kilometers (3.4 mi) south of Lærdalsøyri in Lærdal. The configuration of the passage looks into the mental strain on drivers, so the shaft is partitioned into four areas, divided by three expansive mountain hollows at 6-kilometer (3.7 mi) interims. While the principle burrow has white lights, the caverns have blue lighting with yellow lights at the edges to give an impression of first light. The holes are intended to break the standard, giving an invigorating view and permitting drivers to take a short rest. The caves are additionally utilized as turnaround focuses and for break regions to help lift claustrophobia amid a 20-moment drive through the passage. To keep drivers from being scatterbrained or nodding off, every path is supplied with an uproarious thunder strip around the focal point.
The shaft does not have crisis retreats. If there should arise an occurrence of mischances and/or flame, numerous security precautionary measures have been made. There are crisis telephones checked "SOS" each 250 meters (820 ft) which can contact the police, fire divisions, and doctor's facilities. Fire quenchers have been put each 125 meters (410 ft). At whatever point a crisis telephone in the shaft is utilized, stop lights and electronic signs perusing: snu og køyr ut (English: turn and drive out) are shown all through the passage. There are 15 turning zones which were developed for transports and semi-trailers. Notwithstanding the three huge sinkholes, crisis corners have been assembled each 500 meters (1,600 ft). There are photograph assessments and tallying of all vehicles that enter and passageway the shaft at security focuses in Lærdal and Bergen. There is additionally uncommon wiring in the passage for the utilization of radio and cell telephones. Speed cams have as of late been introduced in view of genuine speeding (there are not very many other totally straight streets in the region)
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