Editing Boston Post Road (section)

===Manhattan===
Much of the route in [[Manhattan]], where it was known as the Eastern Post Road, was abandoned between 1839 and 1844, when the current [[street grid]] was laid out as part of the [[Commissioners' Plan of 1811|Commissioners' Plan]] that had been originally advanced in 1811.<ref>{{Cite web|url=http://forgotten-ny.com/2001/07/de-classified-4-a/|title=DE-CLASSIFIED 4-A|last=Walsh|first=Kevin|date=July 2001|website=Forgotten New York|language=en-US|access-date=November 4, 2017}}</ref> The following sections of the road still exist:
* [[Broadway (Manhattan)|Broadway]] – [[Park Row (Manhattan)|Park Row]] – [[Bowery]] – [[Park Avenue (Manhattan)|Fourth Avenue]] – Broadway from [[Wall Street]] (the southern end of the Post Road) to [[Madison Square Park]]
* There is a large gap in [[midtown Manhattan]] before Post Road resumes its course north of [[Central Park]]
* [[St. Nicholas Avenue (Manhattan)|St. Nicholas Avenue]]-Broadway: St. Nicholas Avenue from [[110th Street (Manhattan)|110th Street]] (with a realignment near 145th Street), switching to Broadway at 169th Street and continuing to 228th Street
* 228th Street-Kingsbridge Avenue from Broadway to the old [[Kingsbridge, Bronx#History|Kings Bridge]] over the old [[Harlem River]] bed. (The course of the Harlem River was altered in 1895.)

These [[milestone]]s were once present in Manhattan:
* 1 – the west side of [[Bowery]] near [[Rivington Street]]<ref>One Mile House, on the corner of Rivington Street, demolished in 1921, was a meeting-ground for Tammany Hall politicians. [https://www.nytimes.com/1921/04/01/archives/bowery-landmark-in-170000-lease-onemile-house-at-rivington-street.html "Bowery Landmark in $170,000 lease", ''The New York Times'' 1 April 1921]; the painted sign for One Mile House, on the flank of a building on the east side of Bowery, survived into the 1980s.</ref>
* 2 – southwest corner of [[Astor Place (Manhattan)|Astor Place]] and [[Park Avenue (Manhattan)|Fourth Avenue]]
* 3 – [[Madison Avenue (Manhattan)|Madison Avenue]] and [[26th Street (Manhattan)|26th Street]]
* 4 – east side of [[Third Avenue, Manhattan|Third Avenue]], halfway between [[45th Street (Manhattan)|45th Street]] and [[46th Street (Manhattan)|46th Street]]
* 5 – west side of [[Second Avenue, Manhattan|Second Avenue]] at [[62nd Street (Manhattan)|62nd Street]]
* 6 – northwest corner of [[Third Avenue (Manhattan)|Third Avenue]] and [[81st Street (Manhattan)|81st Street]]
* 7 – in [[Central Park]], west of [[Fifth Avenue (Manhattan)|Fifth Avenue]], between [[97th Street (Manhattan)|97th Street]] and [[98th Street (Manhattan)|98th Street]]
* 8 – [[St. Nicholas Avenue (Manhattan)|St. Nicholas Avenue]], west side, between [[115th Street (Manhattan)|115th Street]] and [[116th Street (Manhattan)|116th Street]]
* 9 – [[St. Nicholas Avenue (Manhattan)|St. Nicholas Avenue]], west side, opposite north line of [[133rd Street (Manhattan)|133rd Street]]
* 10 – southwest corner of [[St. Nicholas Avenue (Manhattan)|St. Nicholas Avenue]] and [[152nd Street (Manhattan)|152nd Street]]
* 11 – [[Broadway (Manhattan)|Broadway]], west side, near [[170th Street (Manhattan)|170th Street]] or [[171st Street (Manhattan)|171st Street]] ~ Now at [[Roger Morris Park]] next to the Morris-Jumel Manse 40°50'04.7"N 73°56'18.5"W
* 12 – [[Broadway (Manhattan)|Broadway]], west side, at or near 189th Street ~ Now at the Broadway entrance to [[Isham Park]] 40°52'06.4"N+73°55'08.9"W
* 13 – east side of [[Broadway (Manhattan)|Broadway]] between [[Academy Street (Manhattan)|Academy Street]] and [[204th Street (Manhattan)|204th Street]]
* 14 – [[Broadway (Manhattan)|Broadway]], west side, between 225th Street and 228th Street