Editing Interstate 787 (section)

==Route description==
[[File:2021-09-28 10 42 27 View north along Interstate 787 at Exit 1 (U.S. Route 9W-Southern Boulevard) in Albany, Albany County, New York.jpg|thumb|left|View northbound along I-787 at exit&nbsp;1]]
I-787 officially begins at the [[U.S. Route 9W|US&nbsp;9W]] exit (formerly a [[toll barrier]] for I-87/Thruway exit&nbsp;23); however, a short {{convert|0.57|mi|km|adj=on}} spur between US&nbsp;9W and the interchange connecting I-787 to the Thruway, designated as '''New York State Route&nbsp;912S''' ('''NY&nbsp;912S'''), an unsigned [[reference route (New York)|reference route]], is signed as I-787.<ref name="2008tdr">{{cite web|url=https://www.dot.ny.gov/divisions/engineering/technical-services/hds-respository/Traffic%20Data%20Report%202008.pdf |archive-url=https://web.archive.org/web/20120927022429/https://www.dot.ny.gov/divisions/engineering/technical-services/hds-respository/Traffic%20Data%20Report%202008.pdf |url-status=dead |archive-date=September 27, 2012 |title=2008 Traffic Data Report for New York State |date=June 16, 2009 |pages=323, 342–343 |publisher=[[New York State Department of Transportation]] |access-date=January 27, 2010 }}</ref><ref name="ne" /> At the east end of the interchange (exit&nbsp;1) with I-87, I-787 northbound merges with NY&nbsp;912S, progressing due east for a short distance before curving to the northeast ahead of the [[Delaware and Hudson Railway]] mainline near exit&nbsp;2 ([[New York State Route 32|NY&nbsp;32]]). Past NY&nbsp;32, I-787 parallels the [[Hudson River]] as it heads northward into the heart of downtown Albany, featuring a pair of exits with [[U.S. Route 9 in New York|US&nbsp;9]] and [[U.S. Route 20 in New York|US&nbsp;20]] at a massive interchange southeast of the [[Empire State Plaza]] on the west bank of the Hudson.

North of downtown Albany, I-787 interchanges with [[Interstate 90 in New York|I-90]] at exit&nbsp;5 prior to crossing into [[Menands, New York|Menands]] and meeting NY&nbsp;32 once more at exit&nbsp;6 by way of a [[trumpet interchange]]. The ramp from the trumpet to NY&nbsp;32, a {{convert|0.28|mi|km|-long|adj=mid}} roadway, is designated as unsigned NY&nbsp;913T.<ref name="2008tdr" /> Farther north in Menands, I-787 intersects [[New York State Route 378|NY&nbsp;378]] (exit&nbsp;7) by way of a partial [[cloverleaf interchange]]. In [[Watervliet, New York|Watervliet]], I-787 has one interchange with 23rd Street (exit&nbsp;8) before reaching another partial cloverleaf interchange with NY&nbsp;7 and NY&nbsp;787 (exit&nbsp;9) in Green Island. 
[[File:I787US9Split.jpg|thumb|right|I-787 southbound at exit&nbsp;4B (US&nbsp;9 north)]]
I-787's alignment after exit&nbsp;9 is unclear. Appendix E of the 2008 [[New York State Department of Transportation]] (NYSDOT) Traffic Data Report places the terminus at 8th Street in Troy, creating an [[Concurrency (road)|overlap]] with [[New York State Route 7|NY&nbsp;7]] across the Hudson River via the [[Collar City Bridge]].<ref name="2008tdr" /> Additionally, there are shields for I-787 on the Collar City Bridge east of the Hudson River, and the bridge’s roadway uses I-787 reference markers instead of NY 7. Other sources, including the [[National Highway System (United States)|National Highway System]] map of Albany published by the [[Federal Highway Administration]] (FHWA) and NYSDOT's official description of signed routes in New York State, identifies the terminus as the NY&nbsp;7/[[New York State Route 787|NY&nbsp;787]] interchange near Green Island.<ref>{{cite map |url=http://www.fhwa.dot.gov/hep10/nhs/maps/ny/albany_ny.pdf |title=National Highway System - Albany, NY |year=2003 |access-date=August 22, 2007 |publisher=[[Federal Highway Administration]] |format=PDF |archive-url=https://web.archive.org/web/20080411031917/http://www.fhwa.dot.gov/hep10/nhs/maps/ny/albany_ny.pdf |archive-date=April 11, 2008 |url-status=dead }}</ref><ref>{{cite book |url=https://www.dot.ny.gov/divisions/operating/oom/transportation-systems/repository/2017%20tour-bk.pdf |title=Official Description of Highway Touring Routes, Bicycling Touring Routes, Scenic Byways, & Commemorative/Memorial Designations in New York State |author=New York State Department of Transportation |author-link=New York State Department of Transportation |date=January 2017 |access-date=January 9, 2017}}</ref> Contemporary maps of the Albany area also lack I-787 shields on the Collar City Bridge, signing the roadway only as NY&nbsp;7.<ref>{{cite map |publisher=Rand McNally and Company |title=The Road Atlas 2007 |scale=13/16" = 3 miles |page=69 |section=SH5 |isbn=0-528-95824-0}}</ref><ref>{{cite map |publisher=[[American Map]] |title=New York |year=2007 |scale=1" = 3 miles |section=V9 |isbn=0-8416-5418-2}}</ref>

According to NYSDOT traffic counts, I-787 is {{convert|10.16|mi|km}} long; by limiting I-787 to the section between the Thruway and NY&nbsp;7, the length is reduced to {{convert|9.55|mi|km}}.<ref name="2008tdr" />