An AI-based surveillance system is being used by the state of Tamil Nadu in southern India to stop elephant deaths on its railway tracks.

According to government data, the number of elephant deaths on and around the state's railway tracks is increasing. In the last ten years, 36 elephant deaths have been reported due to train incidents.

Eleven of these deaths happened on two railroad tracks close to Madukkarai, where Kerala's state border meets the forest. The elephants' migration path to nearby woodlands intersects these traces.

In 2021, the state's high court ordered the forest department and railways to prevent elephant deaths on these tracks.

The forest department has now installed 12 towers along two of Madukkarai's rail tracks, each equipped with an AI camera capable of thermal and visible light imaging, along with live viewing.

Project manager Ashish Rajput said that the AI system's cameras, comparable to those used by the Indian Army along the nation's borders, are programmed to even detect humans near railway lines.

When elephants are detected within 100ft of the railway track, alerts are sent to forest and railway officials, who coordinate to slow down trains and guide the elephants away to prevent collisions. Four personnel continuously monitor the system in the control room near the railway track.

The project, launched in February, has been executed at a cost of 72.4m rupees ($867,758; £683,976), says Supriya Sahu, secretary of the Tamil Nadu Forest Department.

Previously, forest personnel conducted regular patrols along railway tracks to monitor elephant activity. Ms Sahu said this method had limitations, and ensuring complete elephant safety from accidents posed "significant challenges".

Within months of its implementation, the AI system has detected nearly 400 instances of elephants approaching railway tracks and promptly reported to railway authorities, thus preventing potential accidents, she said.

"Alerts are sent if any animal, not just elephants, is found nearing the track," say Mr Manikandan, who works at the control room.

This is not the first time AI is being used to protect wildlife in India. In December, India's federal railway ministry said it was implementing an AI-based surveillance system - called Gajraj - in elephant corridors across several states in the country.

Under this project, officials are installing sensors using AI tech near railway tracks which send notifications to alert the railway administration and the forest department about the movement of the elephants, other animals, and humans to prevent accidents.

In African countries like Gabon, Kenya and Botswana, AI camera systems are being used for elephant conservation efforts.

Tamil Nadu has announced plans for its expansion of the new system to five other vulnerable areas in the state, including Coimbatore, Dharmapuri, Hosur, and Gudalur.

"Technological interventions significantly reduce train-related accidents involving wildlife," Ms Sahu said.