Indian Highways, Expressways, Bridges,

gslv markIII

Regular Member
Jan 17, 2016

The National Highways Development Project is a project to upgrade, rehabilitate and widen major highways in India to a higher standard.


The project is composed of the following phases:

  • Phase I: The Golden Quadrilateral (GQ; 5,846 km) connecting the four major cities of Delhi, Mumbai, Chennai and Kolkata with 4 lane highways. This project connecting four metro cities, would be 5,846 km (3,633 mi). Total cost of the project is Rs.300 billion (US$6.8 billion), funded largely by the government’s special petroleum product tax revenues and government borrowing. In January 2012, India announced the four lane GQ highway network as complete.
  • Phase II: North-South and East-West corridors comprising national highways connecting four extreme points of the country with 4 lane highways. The North–South and East–West Corridor (NS-EW; 7,300 km) connecting Srinagar in the north to Kanyakumari in the south, including spur from Salem to Kanyakumari (Via Coimbatore and Kochi) and Silchar in the east to Porbandar in the west. Total length of the network is 7,300 km (4,500 mi).
  • Phase III: The government recently approved NHDP-III to upgrade 12,109 km (7,524 mi)of national highways to 4 lane highways on a Build, Operate and Transfer (BOT) basis, which takes into account high-density traffic, connectivity of state capitals via NHDP Phase I and II, and connectivity to centres of economic importance.
  • Phase IV: The government is widening 13,203 km of highway that were not part of Phase I, II, or III. Phase IV will convert existing single lane highways into two lanes with paved shoulders.
  • Phase V: As road traffic increases over time, a number of four lane highways will need to be upgraded/expanded to six lanes. The current plan calls for upgrade of about 6,500 km of four-lane roads,(Includeing entire GQ )
  • Phase VI: The government is planning to construct expressways that would connect major commercial and industrial townships. It has already identified 400 km (250 mi) of Vadodara (earlier Baroda)-Mumbai section that would connect to the existing Vadodara (earlier Baroda)-Ahmedabad section.The 334 km (208 mi) Expressway between Chennai—Bangalore and 277 km (172 mi) Expressway between Kolkata—Dhanbad has been identified and feasibility study and DPR contract has been awarded by NHAI.
  • Phase VII: This phase calls for improvements to city road networks by adding ring roads to enable easier connectivity with national highways to important cities. In addition, improvements will be made to stretches of national highways that require additional flyovers and bypasses . The 19 km (12 mi) long Chennai Port—Maduravoyal Elevated Expressway is being executed under this phase.
National Highways Development Project is being implemented in all phases except phase VI at present. The present phases improving more than 49,260 km of arterial routes of NH Network to international standards.

The project-wise details NHDP all Phases as below (2 months old data).

Fullscreen capture 22-01-2016 105041.jpg

We have 22503 km of four lane National Highways & 2,264 km of six at lane National Highways at present.

Around 26,000 km. length of National Highways is to be upgraded to 4-lane divided carriageway facility, 6,500 km of National Highways to be upgraded to six lane facility, 20,000 km of existing deficient stretches to be improved to two-lane with paved shoulder facility & 1000 km of expressways will be built as per NHDP phase (I-VII)

Check the updates here .:NHAI:. What it is?


Regular Member
Jul 27, 2018
Chenani-Nashri Tunnel, India's longest tunnel. 2017

Prime Minister Narendra Modi on Sunday inaugurated the country’s longest road tunnel that links the Kashmir Valley with Jammu. The tunnel, bypassing snow-bound upper reaches, will reduce the journey time by two hours and provide a safe, all-weather route to commuters travelling from Jammu and Udhampur to Ramban, Banihal and Srinagar.

Here are some interesting facts about the Chenani-Nashri tunnel:
  • Built at Rs 3,720 crore, the tunnel will reduce the distance between Jammu and Srinagar from 41 km to 9.2 km
  • 1,500 engineers, geologists, skilled workers and labourers worked on the project
  • 92.7 FM is mandatory for vehicles where emergency messages will be relayed
  • 6,000 LED multiple colour lights will be used to break monotony
  • GSM phones will work inside the tunnel. 118 SOS boxes have been set up, one every 150 metres on both sides
  • Smoke and heat dampeners will react quickly in fire incidents
  • 118 CCTVs, one every 75 metres
  • At 5Okm/hr speed, the tunnel is a 12 to 15 minutes drive
  • Each tube has a diameter of 13 metres, while sideway has a diameter of 6 metres
  • Rs. 27 Lakh fuel savings a day
  • Comprises two tubes and 29 cross-passages, with special lane for exigencies
  • Air quality monitors every 12 metres will keep a check on carbon dioxide and carbon monoxide, guiding exhaust fans and air purification
  • Automated Integrated Traffic Control System will monitor traffic round-the-clock and overheated vehicle will be made to stop for cooling off
  • Vehicle distance to be maintained at three metres

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