Published: 22 October 2025General
NHAI Deploys 3D Laser Network Survey Vehicles Across 23 States
The National Highways Authority of India (NHAI) deployed 3D laser-based Network Survey Vehicles across 23 states, covering 20,933 km of national highways. The AI-driven system automatically detects road defects like cracks, potholes, and patches in real-time.
The survey vehicles use LiDAR and high-resolution cameras to create detailed 3D profiles of road surfaces and generate defect maps. The data feeds into NHAI's Integrated Road Management System for prioritised maintenance planning. This marks a shift from manual road inspections to technology-driven asset management, expected to enable predictive, faster and more efficient maintenance.
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Linked questionMedium
How many km of national highways are covered by NHAI's 3D laser survey vehicles?
Explanation · Correct answer DNHAI deployed 3D laser-based Network Survey Vehicles across 23 states covering 20,933 km of national highways for AI-driven defect detection.
Frequently asked questions
What is the NHAI 3D laser network survey initiative covering 23 states?
**NHAI** deployed **3D laser scanning survey vehicles** across **23 states** covering **20,933 km of national highways** to build a detailed digital condition database for highway assets, enabling data-driven maintenance planning.
How does NHAI's 3D laser survey reduce highway maintenance costs?
By providing **precise, objective road condition data**, NHAI's 3D laser survey enables **targeted maintenance** (fixing only what is needed) rather than costly blanket resurfacing, optimising the highway maintenance budget across the national network.
What is the connection between NHAI's 3D survey and the Bharatmala programme?
NHAI's 3D laser survey supports **Bharatmala Pariyojana** — India's ambitious highway expansion programme — by providing data for **optimising alignments, identifying maintenance needs**, and monitoring the condition of newly built highway stretches.
Why are 23 states specifically covered by NHAI's 3D laser survey?
The **23-state coverage** represents the states with significant national highway stretches requiring comprehensive condition assessment. The survey prioritises **high-traffic corridors, economic highways, and recently constructed stretches** for data collection.
What is the annual length of national highways in India and what does 20,933 km represent?
India's national highway network spans approximately **1.46 lakh km** (146,000 km). The **20,933 km surveyed** by NHAI's 3D vehicles represents about **14% of the total network**, covering critical corridors prioritised for detailed assessment.
