Route

NY 231

4 bridges carry it · 44 indexed contracts · 4 STIP entries name it

Bridges carrying NY 231 4

BIN	Carries / crosses	County	Owner	Built	Condition
1018342 Bridge	NY231 over 27 27 07051065	Suffolk	NYSDOT	1971	Fair
1042180 Bridge	NY231 over 908M908M07021063	Suffolk	NYSDOT	1950	Fair
1056012 Bridge	NY231 over JOHN STREET	Suffolk	NYSDOT	1968	Fair
1056250 Bridge	NY231 over 908M908M07021063	Suffolk	NYSDOT	1968	Good

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 231 4

PIN 076255STIP
IMPROVE LONG ISLAND AVE FROM STRAIGHT PATH TO NYS ROUTE T231
Programmed FFY 2026 $325k, FFY 2027 $4.1M · Suffolk
PIN 0ADA28STIP
ADA Compliance
Programmed FFY 2028 $3.3M · Suffolk
PIN 0T2091STIP
CRACK SEALING CONTRACT
Programmed FFY 2026 $530k, FFY 2027 $10M · Nassau
PIN 0T2589STIP
ASPHALT PAVEMENT RESURFACING
Programmed FFY 2027 $530k, FFY 2028 $17M · Nassau

All matching projects →

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 231 44

D264714Awarded Mar 14, 2022
Priority Surface Treatment at Various Locations in the Towns of Babylon, Islip & Smithtown.
NY 25A, NY 908M, NY 231, NY 111, NY 906D, NY 906C, NY 908K · Babylon (town), Islip (town), Smithtown (town) · Suffolk · PIN 0810.41 · 270 sheets indexed
Record Plans Online ↗
D264325Awarded Nov 2, 2020
Clean, Repair or Replace Drainage Structures to Restore Original Functionality at Various Locations
NY 25, NY 25A, NY 27, NY 27A, NY 102, NY 110, NY 111, NY 231 · Islip (town), Riverhead (town), Oyster Bay (town), Huntington (town), Hempstead (town), North Hempstead (town), Smithtown (town), Garden City (village) · Nassau and others · PIN 0810.04 · 123 sheets indexed
Record Plans Online ↗
D264139Awarded Mar 16, 2020
Concrete Pavement Repairs on NY 231 in the Towns of Babylon & Huntington.
NY 231 · Babylon (town), Huntington (town) · Suffolk · PIN 0011.45.101 · 0 sheets indexed
Record Plans Online ↗
D263866Awarded Mar 5, 2019
Overhead Sign Structure Replacement, Towns of Babylon, Brookhaven and Islip.
NY 110, NY 231, NY 27 · Babylon (town), Islip (town), Brookhaven (town) · Suffolk · PIN 0809.93 · 141 sheets indexed
Record Plans Online ↗
D263477Awarded Oct 16, 2017
NYS Rte 231 Safety Improvements at Northern State Parkway Interchange in the Town of Huntington.
NY 231 · Babylon (town), Huntington (town) · Suffolk · PIN 0011.43 · 550 sheets indexed
Record Plans Online ↗
D263439Awarded Jul 17, 20178 structures
Bridge Painting and Minor Steel Repairs, Towns of Babylon, Huntington and Islip.
I-495, NY 111, NY 231, NY 27 · Huntington (town), Smithtown (town), Islip (town), Islandia (village), Brookhaven (town), Village Of The Branch (village), Babylon (village), Brightwaters (village) · Suffolk · PIN 0809.65 · 42 sheets indexed
Record Plans Online ↗
D263436Awarded Jul 11, 2017
Concrete Pavement Repairs 4.5 Miles on NY Route 231 in the Towns of Babylon & Huntington
NY 231 · Babylon (town) · Suffolk · PIN 0011.44 · 0 sheets indexed
Record Plans Online ↗
D263039Awarded Jan 26, 2016
Sign Structure Repair Contract
NY 27, I-495, NY 109, NY 231 · Lake Success (village), North Hempstead (town), North Hills (village), Massapequa Park (village), Oyster Bay (town), Huntington (town), Smithtown (town), Islip (town), Islandia (village), Brookhaven (town), Babylon (town), Brightwaters (village), Southampton (town) · Nassau and others · PIN 0809.47 · 179 sheets indexed
Record Plans Online ↗
D262965Awarded Sep 11, 2015
Preventive Maintenance - Pavement (asphalt pavement, markings, traffic signal detector loops and sidewalk curb ramps).
NY 106, NY 25A, NY 231 · Oyster Bay (town), Brookville (village), Muttontown (village), North Hempstead (town), Russell Gardens (village), Lake Success (village), Flower Hill (village), Roslyn (village), East Hills (village), Upper Brookville (village), Babylon (town), Huntington (town), Brookhaven (town), Riverhead (town) · Nassau and others · PIN 0809.56(PE) · 0 sheets indexed
Record Plans Online ↗
D261612Awarded Mar 27, 2011
Rehabilitation of recharge basins at various locations.
I-495, NY 110, NY 231 · Huntington (town), Babylon (town), Smithtown (town), Islip (town) · Suffolk · PIN 0808.66.301 · 47 sheets indexed
Record Plans Online ↗

All contracts on this route →

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.

Roadway Inventory System viewer ↗Traffic Data Viewer ↗