National Highway 209
| National Highway NH209 in India | |
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| Basic data | |
| Operator: | National Highways Authority of India |
| Overall length: | 456 km |
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National Highway 209 ( NH 209 ) is a main highway in the south of the state of India with a length of 456 kilometers. It begins in the metropolis of Bangalore (Bengaluru) in the state of Karnataka and after 170 km through this state leads another 286 km through the neighboring state of Tamil Nadu , where it runs through Coimbatore and Palani and ends in Dindigul at NH 7 .