Major Intersections
The entire route is in Suffolk County.
| Location | Mile | km | Destinations | Notes |
|---|---|---|---|---|
| Hauppauge | 0.00 | 0.00 | Northern State Parkway / NY 454 west | Western terminus of NY 347 / NY 454 overlap |
| 2.19 | 3.52 | NY 454 east | Eastern terminus of NY 347 / NY 454 overlap | |
| 3.00 | 4.83 | NY 111 (Hauppauge Road) | ||
| Smithtown | 4.94 | 7.95 | CR 16 (Terry Road) | |
| Nesconset | 6.91 | 11.12 | NY 25 (Jericho Turnpike) | |
| Lake Grove | 9.16 | 14.74 | CR 97 (Nicolls Road) | |
| Port Jefferson Station | 13.44 | 21.63 | NY 112 (Patchogue Road) | Originally a traffic circle |
| Mount Sinai | 14.48 | 23.30 | NY 25A (Hallock Avenue) |
Read more about this topic: New York State Route 347
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“Never be afraid to meet to the hilt the demand of either work or friendship—two of life’s major assets.”
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