NHAI and WII Study Highlights Effectiveness of Wildlife Mitigation Measures on Delhi–Dehradun Economic Corridor

1. At a Glance

• NHAI and the Wildlife Institute of India (WII) jointly released the report 'Landscapes Reconnected', documenting first-ever camera-trap evidence of wildlife using animal underpasses on the Delhi–Dehradun Economic Corridor [S1].
• Significant for UPSC as a live case of sustainable linear infrastructure, Environmental Impact Assessment outcomes, and habitat connectivity in the Shivalik–Rajaji landscape [S1].

2. Why in the News

• On 10 April 2026, Ministry of Road Transport & Highways announced the WII–NHAI study findings on the 18-km Ganeshpur–Asharodi section [S1].
• The corridor is positioned as proof-of-concept that National Highway development can coexist with biodiversity conservation [S1].

3. Background & Evolution

• Delhi–Dehradun Economic Corridor announced to cut Delhi–Dehradun travel time to ~2.5 hours [S2].
• The Ganeshpur–Asharodi stretch passes through the Rajaji landscape (Shivalik forests, Uttarakhand), an elephant and tiger habitat [S1].
• Mitigation design includes a ~12 km wildlife passage package featuring animal underpasses and an elevated wildlife corridor averaging 6–7 m height, among Asia's largest, to allow free movement of large mammals [S1].
• WII commissioned to undertake post-construction monitoring; report titled 'Landscapes Reconnected' released by NHAI–WII [S1].

4. Core Static Facts

• Parent Ministry: Ministry of Road Transport & Highways (MoRTH) [S1].
• Implementing agency: National Highways Authority of India (NHAI) — statutory body under NHAI Act, 1988 [S1].
• Scientific partner: Wildlife Institute of India (WII), Dehradun — autonomous institute under MoEFCC [S1].
• Study stretch: 18 km Ganeshpur–Asharodi section of Delhi–Dehradun Economic Corridor [S1].
• Images captured: 40,444 camera-trap images [S1].
• Species documented using underpasses: 18 unique wild species — carnivores, herbivores, ungulates, pheasants, primates [S1].
• Most frequent species: Golden Jackal, followed by Nilgai, Sambar, Spotted Deer [S1].
• Elephant crossings recorded: 60 instances of safe passage [S1].
• Landscape fauna: includes tigers, elephants, great hornbills, king cobras [S1].

5. Multi-Dimensional Analysis

Environmental - Demonstrates effectiveness of wildlife underpasses / elevated viaducts as mitigation against habitat fragmentation in eco-sensitive Shivalik landscape [S1]. - Empirical validation strengthens India's compliance with EIA Notification 2006 mandates on linear projects through protected/forest areas [S1].

Scientific / Technological - Camera-trap based monitoring (40,444 images) sets a baseline methodology for post-construction wildlife audit of highways [S1]. - Engineering element — elevated corridor of 6–7 m clearance — calibrated for megafauna (elephants) [S1].

Economic - Corridor designed to reduce Delhi–Dehradun travel to ~2.5 hrs, boosting tourism and trade with Uttarakhand [S2]. - Validates that mitigation costs are recoverable through demonstrable conservation outcomes, aiding future project clearances [S1].

Administrative / Governance - Model of inter-agency collaboration: MoRTH (NHAI) + MoEFCC (WII) — addresses traditional ministry silos on infra vs. environment [S1].

Legal / Constitutional - Touches Article 48A (State to protect environment & wildlife) and Article 51A(g) (citizen duty); operates within Wildlife (Protection) Act, 1972 and Forest (Conservation) Act, 1980 frameworks [S1].

6. Recent Developments

• 10 April 2026: Release of WII report 'Landscapes Reconnected'; first documented evidence of wildlife use of underpasses on Delhi–Dehradun corridor [S1].
• Parallel NHAI works: 12-km Greenfield Bypass to decongest Dehradun in progress [S3].

7. Prelims Hooks

• Report title: 'Landscapes Reconnected' [S1].
• Released by: NHAI in collaboration with WII [S1].
• Length of study section: 18 km (Ganeshpur–Asharodi) [S1].
• Number of camera-trap images: 40,444 [S1].
• Number of wild species recorded using underpass: 18 [S1].
• Most frequently captured species: Golden Jackal [S1].
• Elephant crossings logged: 60 [S1].
• Elevated wildlife corridor height: average 6–7 metres [S1].
• Corridor is among Asia's largest wildlife elevated corridors [S1].
• Parent Ministry: MoRTH (NHAI), not MoEFCC [S1].
• WII headquartered at: Dehradun, autonomous body under MoEFCC [S1].
• Landscape biodiversity: tiger, elephant, great hornbill, king cobra [S1].

8. Mains Relevance

• GS-III: Infrastructure (Roads) & Environment — Conservation, EIA.
• GS-II: Governance — inter-ministerial coordination.
• Possible question stems:
• "Discuss how wildlife mitigation structures on national highways can reconcile the trade-off between infrastructure-led growth and biodiversity conservation, with reference to recent NHAI–WII findings."
• "Evaluate the role of the Wildlife Institute of India in shaping ecologically sensitive infrastructure design in India."
• "Linear infrastructure is a key driver of habitat fragmentation. Examine mitigation strategies adopted in recent Indian highway projects."

9. Related Topics to Study Next

• Wildlife (Protection) Act, 1972 — statutory basis for protected areas.
• Rajaji & Jim Corbett Tiger Reserves — adjacent landscape ecology.
• EIA Notification 2006 — clearance regime for highways.
• Bharatmala Pariyojana — umbrella highway programme.
• National Wildlife Action Plan (2017–2031) — connectivity goals.
• Eco-Sensitive Zones (ESZ) — regulatory buffer around PAs.
• Mumbai–Nagpur Samruddhi Expressway — comparator with wildlife crossings.
• Project Elephant / Elephant Corridors (Gajah Report) — connectivity policy.

10. Common Errors / Trap Areas

• WII is under MoEFCC, NOT MoRTH — though the highway is under MoRTH/NHAI [S1].
• Corridor is Delhi–Dehradun Economic Corridor, not the "Delhi–Dehradun Expressway" alone — the studied 18-km falls in the Ganeshpur–Asharodi segment [S1].
• The 40,444 figure is images, not number of animals; 18 is species count, not individuals [S1].
• Elevated corridor's 6–7 m is average height, designed for elephants, not merely a noise barrier [S1].
• WII is an autonomous institute, not a statutory body created by an Act of Parliament.

11. Sources

• [S1] NHAI and WII Study Highlights Effectiveness of Wildlife Mitigation Measures on Delhi–Dehradun Economic Corridor — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2250714&reg=3&lang=1 — (tier: 1)
• [S2] New corridor between Delhi and Dehradun will cut travel time to just 2.5 hours — https://pib.gov.in/PressReleseDetailm.aspx?PRID=1697186 — (tier: 1)
• [S3] Construction of 12 km Greenfield Bypass by NHAI to decongest Dehradun traffic in full swing — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2255046&reg=3&lang=2 — (tier: 1)