North–South Expressway (Malaysia) in the context of Asian Highway Network

⭐ Core Definition: North–South Expressway (Malaysia)

The North–South Expressway is a network of tolled controlled-access highways running through the west coast of Peninsular Malaysia. The expressway network consists of the northern and southern route, having a total length of 772 kilometres (480 miles). Running through seven states and connecting the Thailand and Singapore borders, the North–South Expressway is an important thoroughfare for local, interstate and international traffic. The expressway is part of route AH2, a designation of the Asian Highway Network.

The expressways were first conceived in 1977 due to increasing congestion on federal route 1, which was the main north–south thoroughfare at the time. However, economic uncertainties and the high cost meant that construction did not begin until 1981. The expressway began opening in stages from 1982, but the economic downturn at the time meant that construction had stalled and the work had to be fully privatised. The expressways were finally completed in 1994, with the tolls collected from the operational sections funding the remainder of the construction work.

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👉 North–South Expressway (Malaysia) in the context of Asian Highway Network

The Asian Highway Network (AH), also known as the Great Asian Highway, is a cooperative project among countries in Asia and the United Nations Economic and Social Commission for Asia and the Pacific (ESCAP) to improve their connectivity via highway systems. It is one of the three pillars of the Asian Land Transport Infrastructure Development (ALTID) project, endorsed by the ESCAP commission at its 48th session in 1992, comprising Asian Highway, Trans-Asian Railway (TAR) and facilitation of land transport projects.

Agreements have been signed by 32 countries to allow the highway to cross the continent and also reach to Europe. Some of the countries taking part in the highway project are India (Act East policy), Sri Lanka, Pakistan, China, Iran, Japan, South Korea, Nepal and Bangladesh. Most of the funding comes from the larger, more advanced Asian nations such as China, South Korea and Singapore as well as international agencies such as the Asian Development Bank (ADB) and the Asian Infrastructure Investment Bank (AIIB).

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⭐ Core Definition: North–South Expressway (Malaysia)
👉 North–South Expressway (Malaysia) in the context of Asian Highway Network
North–South Expressway (Malaysia) in the context of Line source

North–South Expressway (Malaysia) in the context of Line source

A line source, as opposed to a point source, area source, or volume source, is a source of air, noise, water contamination or electromagnetic radiation that emanates from a linear (one-dimensional) geometry. The most prominent linear sources are roadway air pollution, aircraft air emissions, roadway noise, certain types of water pollution sources that emanate over a range of river extent rather than from a discrete point, elongated light tubes, certain dose models in medical physics and electromagnetic antennas. While point sources of pollution were studied since the late nineteenth century, linear sources did not receive much attention from scientists until the late 1960s, when environmental regulations for highways and airports began to emerge. At the same time, computers with the processing power to accommodate the data processing needs of the computer models required to tackle these one-dimensional sources became more available.

In addition, this era of the 1960s saw the first emergence of environmental scientists who spanned the disciplines required to accomplish these studies. For example, meteorologists, chemists, and computer scientists in the air pollution field were required to build complex models to address roadway air dispersion modeling. Prior to the 1960s, these specialities tended to work within their own disciplines, but with the advent of NEPA, the Clean Air Act, the Noise Control Act in the United States, and other seminal legislation, the era of multidisciplinary environmental science had begun.

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