National Highway 8 (NH 8) is a 4-lane (6-lane between Delhi-Jaipur) National Highway in India. According to estimates, it is the busiest highway in the subcontinent, as it connects the national capital Delhi to the financial capital Mumbai, as well as important cities Gurgaon, Jaipur, Ajmer, Udaipur, Ahmedabad, Vadodara and Surat. The total length is 1428km.
The highway is part of the Golden Quadrilateral project undertaken by National Highways Authority of India (NHAI) and was the first section to be completed. The Delhi-Gurgaon Expressway , Jaipur-Kishangarh Expressway , and NE-1 are part of NH 8. Before entering downtown Mumbai, NH 8 passes through nearly all the suburbs on the western line of Mumbai Suburban Railway, where it is popularly known as Western Express Highway.
This Indo-Japanese multi-billion Corridor lies on National Highway-8. Delhi Mumbai Industrial Corridor Development Corporation Limited (DMICDC), the special purpose vehicle (SPV) floated by the government of India for implementing the DMIC projects, had appointed the consultant for undertaking a study on the master plan for the Manesar-Bawal Investment Region (MBIR) and undertaking pre-feasibility studies for two early bird projects. The Haryana government had identified four Early Bird Projects to be implemented as a pilot initiative within the DMIC region, which includes Mass Rapid Transportation System between Gurgaon-Manesar-Bawal, exhibition-cum-convention centre, integrated multi-modal logistics hub and new passenger rail link. The first phase was completed by 2012 with an estimated $90 billion ( Rs 4,23,000 crore) to invested developing infrastructure in the investment regions.
National Highway 48 or NH 48 is a National Highway of India running entirely within the state of Karnataka.It is renumbered as NH-75 now. It links the Port city of Mangalore with the state capital Bangalore, two major cities of Karnataka state. NH 48 passes through towns of Nelamangala, Kunigal, Channarayapatna, Hassan, Sakleshpura, Uppinaangadi and reaches Mangalore. It climbs the Western ghats through the Shiradi range. Total length of this highway is 328 km (204 mi). The highway is known as B.M. (Bangalore- Mangalore) Road and B.H. (Bangalore - Hassan) Road in some stretches where it traverses.
The traffic on this highway has increased after 1990 mainly due to the setting up of MRPL at Katipalla, Mangalore. This highway for movement of goods to and from New Mangalore Port. The government undertaking KSRTC runs several buses day and night in between these two cities along with private operators.The trucks and trailers carrying LPG and other petroleum products from MRPL to Bangalore have been frequent cause of accidents in this road. Also the condition of this national highway gets worse during monsoon ( rainy ) season especially in ghat section. Travellers avoid this route and take either Bangalore-Mysore-Kushalnagara-Mangalore or Charmadi route during rains from month of June to October, even if it takes longer time.