Route

NY 100A

2 bridges carry it · 39 indexed contracts · 1 STIP entries name it

Bridges carrying NY 100A 2

BINCarries / crossesCountyOwnerBuiltCondition
1036200
Bridge
NY100A
over 119 119 87011034
WestchesterNYSDOT1932Fair
1044600
Bridge
NY100A
over 287I287I87011018
WestchesterNYSDOT2004Fair
Source: NYSDOT Bridges. Our copy checked Oct 31, 2026. Matched by the route at the start of the bridge's carried feature.

Programmed projects naming NY 100A 1

  • ROUTE 100A SIDEWALKS
    Programmed FFY 2026 $3k, FFY 2027 $2.6M · Westchester
Source: Statewide Transportation Improvement Program (STIP), updated Jun 23, 2026. Our copy checked Oct 31, 2026. Matched by route words in the title (RT 414, NY 414, Route 414).

Latest contracts on NY 100A 39

  • D265095Awarded Jan 12, 2024
    PAVEMENT MARKINGS - Various Routes, Various Locations.
    NY 9, NY 9H, NY 23, NY 23B, NY 9D, NY 9G, NY 22, NY 44, NY 52, NY 55, NY 82, NY 113, NY 376, NY 6, NY 6N, NY 118, NY 311, NY 312, NY 1, NY 9A, NY 35, NY 100, NY 100A, NY 100B, NY 100C, NY 116, NY 117, NY 119, NY 120, NY 120A · Columbia and others · PIN 8814.81 · 0 sheets indexed
  • D264970Awarded May 9, 2023
    CATCH BASIN - CLEANING - Routes Varies through Counties
    I-684, NY 100, NY 100A, NY 116, NY 117, NY 118, NY 119, NY 120, NY 121, NY 123, NY 124, NY 125, NY 129, NY 133, NY 134, NY 137, NY 138, NY 141, NY 172, NY 22, NY 35, NY 6N, NY 9A, US 1, US 6, US 9, US 9W, NY 45, NY 303, NY 304 · Rockland and others · PIN 8816.57 · 0 sheets indexed
  • D264286Awarded May 6, 2021
    Traffic Signal, Sidewalk, etc. Improvements at 7 Locations in Fishkill, Greenburgh, Hyde Park, Kingston & Scarsdale.
    NY 52, US 9, US 9W, NY 100, NY 100A, NY 100B, NY 100C, NY 22, NY 9A · Fishkill (town), Hyde Park (town), Saugerties (town), Greenburgh (town), Scarsdale (village), Elmsford (village), Kingston (city), Scarsdale (town) · Dutchess and others · PIN 8812.04 · 103 sheets indexed
  • D264251Awarded Jul 6, 2020
    Resurfacing, ADA Curb Ramps, Traffic Signals: Towns of Greenburgh, Mount Pleasant, New Castle, and North Castle
    NY 100, NY 100A, NY 100B, NY 120, NY 128 · Greenburgh (town), North Castle (town), Mount Pleasant (town), New Castle (town), Mount Kisco (village) · Westchester · PIN 8815.22.101 · 0 sheets indexed
  • D264069Awarded Feb 13, 2020
    Installation & Upgrades to Traffic Signals & Pedestrian Facilities at Various Locations in the Towns of Carmel, Eastchester, Greenburgh & Somers
    NY 118, US 6, NY 100, NY 100A, NY 100B, NY 138, NY 22, NY 6N, US 202 · Carmel (town), Greenburgh (town), Somers (town), Eastchester (town), North Salem (town), Yorktown (town) · Putnam and others · PIN 8815.13(PE) · 52 sheets indexed
  • D263856Awarded Feb 4, 2019
    2 Miles of ADA Curb Ramp, Sidewalk Replacement at Various Locations
    NY 100, NY 100A, NY 100C, NY 117, NY 120, NY 128, NY 141, NY 22, NY 448, NY 9A, US 9 · Greenburgh (town), Mount Pleasant (town), Elmsford (village), Pleasantville (village), North Castle (town), Hastings-On-Hudson (village), Dobbs Ferry (village), Tarrytown (village), Sleepy Hollow (village) · Westchester · PIN 8814.35.121 · 22 sheets indexed
  • D261361Awarded Jun 29, 2010
    Intersection Improvement at Rt. 100A and 100B, in the Town of Greenburgh in Westchester County.
    NY 100, NY 100A, NY 100B · Greenburgh (town), Elmsford (village) · Westchester · PIN 8023.04.301 · 76 sheets indexed
  • D260157Awarded Mar 31, 2006
    A.C. Milling and Resurfacing of Existing Pavement, Minor Drainage Improvements, Restoring and/or Widening Shoulders on Various Roadways, RT. 987G, 987H, 987J, 907K, 9A, 100B, 141
    NY 100, NY 100A, NY 100B, NY 100C, NY 141, NY 9A · Putnam Valley (town), Carmel (town), Kent (town), Yonkers (city), Mount Vernon (city), Eastchester (town), Hastings-On-Hudson (village), Dobbs Ferry (village), Irvington (village), Greenburgh (town), Elmsford (village), Mount Pleasant (town), Peekskill (city), Cortlandt (town) · Putnam and others · PIN 8004.03
  • D260028Awarded Dec 13, 2005
    Guide Rail Installation At Various Locations, RTS. 20, 987G, 984A, 301, 312, 32, 52, 211, 17K, 210, 299, 55, 9W, 6, 116, 121, 9, 100A, 120, 907W, 303, 120A;
    NY 22, US 20, NY 115, NY 17, NY 17K, NY 210, NY 211, NY 32, NY 52, NY 301, NY 312, NY 303, US 9W, NY 299, NY 55, NY 100, NY 100A, NY 116, NY 119, NY 120, NY 120A, NY 121, US 202, US 6, US 9 · New Lebanon (town), Poughkeepsie (town), Hyde Park (town), Pleasant Valley (town), Clinton (town), Newburgh (town), Woodbury (village), Harriman (village), Monroe (town), Crawford (town), Warwick (town), Greenwood Lake (village), Wallkill (town), Montgomery (town), Philipstown (town), Putnam Valley (town), Kent (town), Southeast (town), Orangetown (town), Clarkstown (town), Piermont (village), South Nyack (village), New Paltz (village), Lloyd (town), Kingston (city), Ulster (town), Wawarsing (town), Pelham Manor (village), Pelham (village), Mount Vernon (city), Eastchester (town), New Rochelle (city), Scarsdale (village), White Plains (city), Harrison (village), Rye Brook (village), Greenburgh (town), Elmsford (village), North Salem (town), Bedford (town), Pound Ridge (town), Lewisboro (town), Cortlandt (town), Peekskill (city), Sleepy Hollow (village) · Columbia and others · PIN 8808.82
  • D259829Awarded Mar 29, 2005
    GUIDE RAIL, RT. 82, 44A, 6, 311, 32, 212, 17A, 208, 218, 9A, 35, 100A;
    NY 82, US 44, NY 17A, NY 208, NY 218, NY 311, NY 52, US 6, NY 212, NY 213, NY 32, NY 100, NY 100A, NY 35, NY 9A · La Grange (town), Union Vale (town), Washington (town), Warwick (town), Greenwood Lake (village), Monroe (town), South Blooming Grove (village), Washingtonville (village), Cornwall-On-Hudson (village), Cornwall (town), Kent (town), Carmel (town), Southeast (town), Brewster (village), Saugerties (town), Esopus (town), New Paltz (town), Mount Pleasant (town), Elmsford (village), Greenburgh (town), Somers (town) · Dutchess and others · PIN 8808.81
Source: NYSDOT Highway Record Plans, updated Jun 26, 2026. Our copy checked Oct 31, 2026.

Road inventory and traffic

Segment facts (lanes, functional class, AADT by segment) are in NYSDOT's viewers, which have no documented public data service yet.