The Red Line or Line 5 is one of the planned lines of Chennai Metro. It is part of the second phase of the project and the under construction line stretches from Madhavaram Milk Colony to Sholinganallur. The 44.6 km (27.7 mi) long line will consist of 45 stations, out of which six will be underground and 39 will be at grade or elevated. A branch line of corridor five from Koyambedu to Avadi has been proposed with detailed project report preparation expected to be completed by January 2025.