NHAI Releases First Annual Report on National Highways – Green Cover Index (NH-GCI) for 2025-26

1. At a Glance

• NH-GCI is the first-of-its-kind annual, satellite-derived quantitative assessment of green cover within the Right of Way (RoW) of India's National Highways, released by NHAI on 9 March 2026 [1].
• Prepared jointly with NRSC (National Remote Sensing Centre), ISRO; uses chlorophyll content captured via high-resolution satellite sensors at 1-km granularity along both sides of the carriageway [1][2].
• Relevant for UPSC as a convergence of infrastructure (MoRTH), space technology (ISRO), and environmental monitoring — fits GS-III (Infra, Environment, S&T) [1].

2. Why in the News

• 9 March 2026 (PIB Delhi): Ministry of Road Transport & Highways released the first NH-GCI Annual Report 2025-26 under a 3-year NHAI-NRSC MoU [1].

3. Background & Evolution

• January 2024: NHAI signed a three-year MoU with NRSC/ISRO to develop and report a Green Cover Index for the NH network [2].
• First assessment cycle aims to capture region-wise baseline; subsequent annual cycles to track growth patterns of green cover [2].
• Builds on earlier NHAI greening initiatives — Harit Path mobile app for plantation monitoring and Miyawaki plantations along NHs [3].

4. Core Static Facts

• Name: National Highways – Green Cover Index (NH-GCI) [1].
• Parent ministry: Ministry of Road Transport & Highways (MoRTH) [1].
• Implementing agency: National Highways Authority of India (NHAI), a statutory body under the NHAI Act, 1988 [1].
• Technical partner: NRSC, Hyderabad, under ISRO, Department of Space [2].
• Instrument: High-resolution satellite sensors measuring chlorophyll content [1].
• Spatial unit: Reported as percentage of land covered by green cover within RoW at 1-km granularity [1][2].
• Coverage area: Within the Right of Way (RoW) — both left and right sides of NHs [1].
• MoU period: 3 years from January 2024 [2].
• Reporting cadence: Annual [1].

5. Multi-Dimensional Analysis

Environmental

• Provides objective, technology-driven baseline for vegetation along NHs, enabling carbon-sink accounting and afforestation audit [1].
• Complements NHAI's Miyawaki plantation drive aimed at dense native greening [3].

Scientific / Technological

• Uses chlorophyll-based spectral indices (akin to NDVI/RECI families) from ISRO satellite data — operationalises space-tech for infrastructure governance [1].
• Granular 1-km-segment metrics allow project/package-level accountability [2].

Administrative / Governance

• Enables ranking, comparison, and targeted interventions across NH stretches and contractors [1].
• Creates a measurable KPI to plug accountability gap in highway plantation contracts.

Economic

• Supports NHAI's Green Bond financing narrative (Rs 1,000 crore issuance announced earlier) by providing verifiable ESG metric [4].

6. Recent Developments (last 12-18 months)

• Jan 2024: NHAI–NRSC MoU signed [2].
• 2025: NHAI Sustainability Report highlighted environment initiatives (Miyawaki, Harit Path, etc.) [3].
• 9 Mar 2026: First NH-GCI Annual Report released [1].

7. Prelims Hooks

• NH-GCI is released by NHAI, not MoEFCC or ISRO [1].
• Technical partner: NRSC, headquartered in Hyderabad, under ISRO/Department of Space [2].
• Underlying parameter measured: chlorophyll content via satellite sensors [1].
• Reporting unit: percentage of RoW green-covered per 1 km [1].
• Coverage: Right of Way (RoW) of National Highways [1].
• MoU signed in January 2024 for a 3-year period [2].
• First Annual Report dated 9 March 2026 [1].
• NHAI is a statutory body under NHAI Act, 1988; works under MoRTH [1].
• Related NHAI greening app: Harit Path; plantation method: Miyawaki [3].

8. Mains Relevance

• GS-III: Infrastructure (Roads/Highways); Environmental Conservation; Science & Technology — application of space tech.
• Syllabus hooks: "Infrastructure: Energy, Ports, Roads…", "Conservation, environmental impact assessment", "Awareness in space".
• Possible stems: 1. "Discuss how space-based monitoring tools like NH-GCI can strengthen environmental accountability in India's infrastructure sector." 2. "Highway expansion in India faces a trade-off between connectivity and ecological cost. Examine NHAI's recent initiatives to mitigate the latter." 3. "Examine the role of ISRO's downstream applications in civilian governance, with reference to NH-GCI."

9. Related Topics to Study Next

• Bharatmala Pariyojana — driver of NH network expansion whose ecological footprint NH-GCI tracks.
• Compensatory Afforestation Fund (CAMPA) — parallel afforestation accountability mechanism.
• NDVI & ISRO Bhuvan platform — comparable remote-sensing vegetation indices.
• NHAI Green Bonds — ESG financing complementing GCI metrics [4].
• Miyawaki Plantation method — used by NHAI for dense roadside greening [3].
• Forest Survey of India – India State of Forest Report — national green-cover benchmark.
• National Mission for a Green India (GIM) — under NAPCC, broader afforestation target.
• EIA Notification 2006 — clearance framework for highway projects.

10. Common Errors / Trap Areas

• NH-GCI is released by NHAI/MoRTH, NOT MoEFCC or ISRO directly — ISRO/NRSC is only the technical partner [1].
• Index measures chlorophyll-based green cover within RoW, NOT total forest cover or NDVI of districts [1].
• The MoU is 3 years from January 2024, not 5 years; report is annual, not one-time [2].
• Granularity is 1 km segment, not state-wise aggregate (state ranking is derivable, not the primary unit) [2].
• Do not confuse NH-GCI with NHCCI (National Highways Construction Cost Index) — both are NHAI products with similar acronyms [5].