# S.A.R.T.H.I.: An AI Navigation Assistant for Indian Railway Stations

Navigating a large railway station is hard — especially for first-time visitors, non-local language speakers, and passengers with disabilities. S.A.R.T.H.I. (Station AI for Routing, Transit and Helpful Information) solves this with an AI assistant that helps passengers navigate, find facilities, and get accessibility-aware guidance through natural conversation.

## How It Works

- Data Layer— Official railway documents, facility info, and accessibility guidelines, structured and stored for retrieval

- RAG Layer— Documents are chunked, embedded, and stored in ChromaDB; answers are generated only from retrieved context, reducing hallucination

- Intelligence Layer — Multilingual understanding, intent classification, and accessibility-aware routing (wheelchair/visually impaired-friendly paths via Dijkstra's algorithm)

- Application Layer — A chat interface, an interactive Digital Twin Map for turn-by-turn navigation, and an admin dashboard for station staff

## Key Features

Voice & text navigation • Digital Twin Map • Accessibility-friendly routing • Facility finder (lifts, washrooms, ATMs) • Emergency help access • Complaint tracking • Admin dashboard

## Tech Stack

Python, Flask, Cohere (embeddings & generation), ChromaDB

## Why It Matters

SARTHI reduces passenger dependency on station staff, supports Indian Railways' accessibility goals, and generates data that can guide real infrastructure planning — scalable across multiple stations with minimal setup.