National Highway 18
| National Highway NH18 in India | |
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| Basic data | |
| Operator: | National Highways Authority of India |
| Overall length: | 369 km |
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National Highway 18 ( NH 18 ) is a major trunk road in southeastern India with a length of 369 kilometers, which is entirely in the state of Andhra Pradesh . It starts in Kurnool on NH 7 and leads via Kadapa (Cuddapah) to Chittoor on NH 4 .