Green Highways: UPSC Exam Focus on Eco-Friendly NH Projects

29 Jul Green Highways: UPSC Exam Focus on Eco-Friendly NH Projects

Subject Relevance — Where This Topic Fits

• GS Paper III — Environment and Ecology  |  GS Paper III — Infrastructure: Energy, Ports, Roads, Airports, Railways
• Prelims: Green Highways Policy 2015, Right of Way (ROW), National Highways Authority of India (NHAI), Miyawaki afforestation, Recycled materials in construction, Compensatory afforestation, Fly ash in embankments, Plastic waste in bituminous layers
• Essay: Sustainable Infrastructure Development: Balancing Economic Growth and Environmental Conservation, Innovative Technologies in Environmental Governance: A Case for Green Highways

Quick Revision: The Green Highways Policy 2015 mandates afforestation along National Highways using ROW land, integrating recycled materials like fly ash and plastic waste in construction to promote environmental sustainability.

Why is this in the news?

The Ministry of Road Transport and Highways (MoRTH) has released data on the Green Highways initiative, highlighting the planting of over 3.61 crore saplings along approximately 1.32 lakh km of National Highways (NHs) in the last five years. This initiative, framed under the Green Highways Policy 2015 and aligned with Indian Roads Congress (IRC:SP:21) guidelines, underscores India’s commitment to integrating environmental sustainability into infrastructure development while addressing climate change mitigation and ecological restoration.

Background

• The Green Highways Policy 2015 was formulated to promote afforestation, transplantation, beautification, and maintenance along National Highways, leveraging the Right of Way (ROW) land.
• The policy mandates the use of recycled and waste materials in highway construction to reduce environmental impact and enhance resource efficiency.
• Sustainable construction practices, such as the use of fly ash, recycled aggregates, and plastic waste in bituminous layers, have been institutionalized through policy reforms.
• Recent innovations include Miyawaki afforestation, drone-based monitoring, and compensatory afforestation to offset tree felling during highway expansion.

What is the Green Highways Initiative?

• A policy framework launched in 2015 under the Ministry of Road Transport and Highways (MoRTH) to integrate environmental sustainability into National Highway (NH) development.
• Promotes the use of recycled and waste materials such as fly ash, recycled asphalt pavement (RAP), plastic waste in bituminous layers, and bamboo crash barriers to reduce environmental footprint.
• Encourages compensatory afforestation and tree transplantation to offset deforestation caused by highway expansion, ensuring ecological balance.
• Incorporates Miyawaki afforestation—a dense, fast-growing forest method—to enhance biodiversity and carbon sequestration along highways.
• Utilizes drone technology for real-time monitoring of plantation growth and health, ensuring transparency and efficiency in implementation.
• Aligns with sustainable construction practices, including the use of treated sewage water from Sewage Treatment Plants (STPs) and industrial by-products like slag.
• Aims to reduce emissions, conserve natural resources, and minimize environmental degradation during highway construction and maintenance.

Key Features

Why it Matters

Environmental Sustainability

• Mitigates climate change impacts by sequestering ~3.61 crore tonnes of CO₂ through afforestation along 1.32 lakh km of NHs over five years.
• Reduces plastic pollution by integrating ~15-20% plastic waste in bituminous layers, aligning with Swachh Bharat Mission and circular economy principles.
• Enhances biodiversity corridors, supporting pollinators, avifauna, and microhabitats within NH ROWs, contributing to India’s Nationally Determined Contributions (NDCs).

Economic Efficiency

• Lowers long-term maintenance costs via indigenous, fast-growing species (e.g., bamboos, neem) that require minimal irrigation and pest control.
• Reduces raw material expenditure by substituting 30-40% of virgin aggregates with recycled materials (e.g., RAP, slag), cutting project costs by 8-12%.
• Generates rural employment through plantation drives, nursery operations, and eco-tourism potential along green highways.

Technological Innovation

• Adoption of geotextiles (jute/coir) for soil stabilization, reducing erosion and sediment runoff into water bodies.
• Use of bio-bitumen and crumb rubber in asphalt mixes improves durability and reduces road surface temperatures by 5-8°C, lowering urban heat island effects.
• Integration of IoT sensors and AI for real-time monitoring of air quality, soil moisture, and structural integrity of green corridors.

Strategic Infrastructure

• Enhances road safety by reducing glare from headlights (via green belts) and mitigating dust pollution in arid/semi-arid regions.
• Supports national missions like PM Gati Shakti and Bharatmala Pariyojana by ensuring ecological compliance in linear infrastructure projects.
• Strengthens India’s global climate commitments under the Paris Agreement and UN Sustainable Development Goals (SDGs 11, 13, 15).

Challenges

1. Land Tenure and ROW Constraints

• Limited availability of contiguous ROW land in densely populated states (e.g., Bihar, UP) hampers large-scale afforestation.
• Conflicts with local land-use patterns (agriculture, settlements) necessitate multi-stakeholder negotiations for ROW acquisition.
• Legal ambiguities in compensatory afforestation (e.g., land allotment delays, monitoring lapses) undermine ecological mitigation.

UPSC Link: Land Reforms – Land Acquisition Act 2013

2. Species Selection and Survival Rates

• High mortality of saplings (30-40% in first year) due to extreme weather, poor soil quality, or pest attacks in NH corridors.
• Over-reliance on fast-growing but non-native species (e.g., eucalyptus) risks ecological imbalance and water depletion.
• Lack of standardized survival monitoring protocols leads to inconsistent data on plantation success.

UPSC Link: Forest Conservation Act 1980

3. Waste Material Integration Challenges

• Inconsistent quality of recycled materials (e.g., RAP, plastic waste) affects road durability, requiring stringent quality control.
• High initial costs for segregating and processing waste streams (e.g., C&D waste) deter widespread adoption by contractors.
• Regulatory hurdles in certifying recycled materials for NH use under IRC standards slow down implementation.

UPSC Link: Solid Waste Management Rules 2016

4. Monitoring and Enforcement Gaps

• Absence of a unified digital platform for tracking plantation health and maintenance across states leads to data silos.
• Weak enforcement of environmental mitigation measures (e.g., failure to plant saplings post-project) due to lack of penalties.
• Inadequate capacity of state agencies in adopting advanced techniques (e.g., Miyawaki, drones) limits scalability.

UPSC Link: Environmental Impact Assessment Notification 2006

5. Climate Vulnerability

• Increased frequency of extreme weather events (droughts, floods) disrupts plantation schedules and increases survival risks.
• Rising temperatures in NH corridors (e.g., Rajasthan, Gujarat) reduce sapling growth rates, necessitating heat-resistant species.
• Salinization of soil in coastal NHs (e.g., Tamil Nadu, Odisha) challenges the viability of traditional afforestation methods.

UPSC Link: National Action Plan on Climate Change

Challenges — UPSC Perspective

Way Forward

• Establish a **National Green Corridors Authority** under MoRTH to standardize monitoring, enforcement, and data-sharing across states.
• Mandate **climate-resilient afforestation** by integrating drought-resistant, native species (e.g., babul, khejri) in arid/semi-arid NH stretches.
• Develop **public-private partnerships (PPPs)** for waste-to-road projects, incentivizing contractors to use recycled materials via tax rebates.
• Launch **drone-based sapling health audits** in 100 high-priority NH corridors to improve survival rates and reduce manual inspections.
• Integrate **AI-driven predictive modeling** for plantation success, using historical climate and soil data to optimize species selection.
• Expand **compensatory afforestation funds** under CAMPA to cover NH-specific projects, ensuring timely land allotment and monitoring.
• Introduce **green highway rating system** (similar to GRIHA) to incentivize states/UTs for exceeding afforestation targets.
• Conduct **capacity-building workshops** for state agencies on advanced techniques (Miyawaki, geotextiles) and digital tools.

UPSC Value Addition

Prelims Practice Questions

Q1. Consider the following statements regarding the Green Highways Policy 2015 of the Government of India:
1. It mandates the planting of trees on the Right of Way (RoW) of National Highways.
2. The policy promotes the use of recycled construction materials in highway projects.
3. Compensatory afforestation is mandatory only when trees are cut for highway expansion.
4. The policy is implemented under the guidelines of the Indian Roads Congress (IRC): SP:21.

How many of the above statements are correct?

1. Only one
2. Only two
3. Only three
4. All

Answer: Only three — Statements 1, 2, and 4 are correct as per the policy. Statement 3 is incorrect because compensatory afforestation is required not only when trees are cut but also as a general environmental mitigation measure.

Q2. Assertion (A): The Green Highways Policy 2015 encourages the use of plastic waste in bituminous layers of road construction.
Reason (R): The policy aims to promote sustainable construction practices and reduce environmental impact.

In the context of the above two statements, which one of the following is correct?

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, but R is NOT the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Answer: Both A and R are true, but R is NOT the correct explanation of A. — Both Assertion (A) and Reason (R) are true, and Reason (R) correctly explains Assertion (A) as the policy explicitly promotes the use of plastic waste in road construction to enhance sustainability.

Q3. Match the following sustainable materials used in National Highway projects with their respective applications:

Column I (Sustainable Material) | Column II (Application)
1. Fly Ash / Pond Ash | A. Structural embankments
2. Reclaimed Asphalt Pavement (RAP) | B. Bituminous layers
3. Crumb Rubber | C. Road surfacing
4. Bio-bitumen | D. Asphalt modification

Select the correct match:

1. 1-A, 2-B, 3-D, 4-C
2. 1-B, 2-A, 3-C, 4-D
3. 1-A, 2-C, 3-D, 4-B
4. 1-D, 2-B, 3-A, 4-C

Answer: 1-A, 2-B, 3-D, 4-C — The correct matches are: 1-A (Fly Ash for structural embankments), 2-B (RAP for bituminous layers), 3-D (Crumb Rubber for asphalt modification), and 4-C (Bio-bitumen for road surfacing).

Mains Practice Question

✍ Critically examine the role of the Green Highways Policy 2015 in promoting environmental sustainability in India’s National Highway infrastructure. Substantiate your answer with reference to recent initiatives such as the use of recycled materials, Miyawaki afforestation, and compensatory afforestation. (15 Marks)

Approach: MODEL-ANSWER SKELETON:
1. **Introduction**: Briefly define the Green Highways Policy 2015 and its objectives under the Ministry of Road Transport and Highways (MoRTH).
2. **Environmental Sustainability Measures**:
– **Tree Plantation and Miyawaki Afforestation**: Discuss the policy’s mandate for planting 3.61 crore saplings along 1.32 lakh km of NHs, including the Miyawaki method for dense urban corridors.
– **Compensatory Afforestation**: Explain the requirement for compensatory afforestation and transplantation of trees when cutting is unavoidable, citing IRC: SP:21 guidelines.
3. **Use of Recycled and Sustainable Materials**:
– **Fly Ash/Pond Ash**: Highlight its use in embankments and structural works (as per IRC: SP:21).
– **Reclaimed Asphalt Pavement (RAP)**: Discuss its incorporation in bituminous layers to reduce resource consumption.
– **Plastic Waste and Crumb Rubber**: Explain their use in bituminous mixes to enhance durability and reduce plastic waste.
– **Bio-bitumen and Treated Sewage Water**: Mention their application in road construction and maintenance.
4. **Carbon Offsetting and Monitoring**: Discuss the policy’s emphasis on carbon offsetting through afforestation and drone-based monitoring of plant health.
5. **Challenges and Criticisms**:
– **Implementation Gaps**: Address issues like inconsistent state-wise performance (e.g., Arunachal Pradesh vs. Gujarat in sapling plantation).
– **Long-term Sustainability**: Question the survival rate of saplings and the effectiveness of compensatory afforestation over decades.
6. **Conclusion**: Summarize the policy’s contributions to sustainable infrastructure while acknowledging the need for stricter monitoring and technological integration (e.g., AI-driven afforestation tracking).

Key Data Points to Include:
– 3.61 crore saplings planted over 1.32 lakh km NHs in 5 years.
– States like Gujarat and Haryana leading in plantation efforts.
– IRC: SP:21 guidelines as the technical framework.
– Recent initiatives like drone surveillance and Miyawaki afforestation.

Source: PIB (Press Information Bureau)

Generated by AanyaAi for educational purpose.

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