NY 347 begins at the eastern terminus of the Northern Parkway in Hauppauge. At this point, it is multiplexed with Veterans Memorial Highway (NY 454). A short distance east of the Northern Parkway, NY 347 splits off from Veterans Memorial Highway (NY 454) as Smithtown Bypass and runs to the northeast. When it crosses the Smithtown-Brookhaven town line, it becomes Nesconset Highway. It ends at NY 25A, just east of NY 112 in Port Jefferson.
Copyright © 2003-2019 by David Golub. All rights reserved. The author would like to thank William Roll for contributing photographs and LC for contributing documents to this web site. You may not reproduce any text or photographs on this web site without express permission from the author. Hotlinking of images from this site is strictly prohibited. Route symbols based on graphics from Central PA/MD Roads and Wikipedia.