Line 4 (Chennai Metro)

Orange Line (Line 4)
Overview
Status	Under Construction
Termini	Lighthouse Poonamallee Bypass
Stations	28
Service
Type	Rapid transit
System	Chennai Metro
Operator(s)	Chennai Metro Rail Limited
Technical
Line length	26.1 km (16.2 mi)
Number of tracks	2
Character	10.1 km (6.3 mi) Underground 16 km (9.9 mi) Elevated
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	25 kV 50 Hz AC overhead catenary
Route map Legend Lighthouse Kutchery Road MRTS line Thirumayilai Purple Line Thirumayilai railway station Alwarpet Bharathidasan Road Boat Club Nandanam Blue Line Panagal Park Kodambakkam Kodambakkam railway station Power House Vadapalani Green Line Saligramam Saligramam Ware House Alwarthirunagar Red Line Valasaravakkam Red Line Karambakkam Red Line Alapakkam Junction Red Line Porur Junction Porur Bypass NH 32:Chennai Bypass Road Thelliyaragaram Iyyapanthangal Kattupakkam Kumananchavadi Karayanchavadi Mullaithottam Poonamallee Poonamallee Depot Chennai Outer Ring Road Poonamallee Bypass Nazarathpet Chembarambakkam Thirumazhisai Pappanchatiram Chettipedu Thandalam Irungattukottai Sipcot Chennai-Bangalore Expressway Pennalur Sriperumbudur Pattunool Chatram Irungulam Industrial Estate Mambakkam Sunguvarchatiram Santhavelur Pillaichatiram Neervalur Parandur

The Orange Line or Line 4 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 Lighthouse to Poonamallee Bypass. The line will consist of 27 stations, out of which nine will be underground and 18 will be at grade or elevated.