Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Indore - Chennai Express which is now better known as Ahilya Nagari Express after extension to Trivandrum was a weekly mail express train of the Indian Railways, running between Chennai Central railway station of Chennai, the capital city of Tamil Nadu and Indore Junction BG railway station of Indore, the largest city and commercial capital of Madhya Pradesh. Previously it was running between Chennai and Indore, later it extended to Trivandrum.