DATA JOURNALISM · MAY 2026

The 10 Most Dangerous Roads on Long Island Right Now

A data-driven look at where crashes, fatalities, and DWI arrests are concentrated across Nassau and Suffolk — based on 90 days of incident reports from 511NY, NYS Police Troop L, Suffolk County Police, and Nassau County Police, computed at build time from the longislandtraffic.com events database.

1,536 crashes analyzed 127 fatal-titled incidents 69 DWI arrests 90-day window 17 corridors ranked

By Nate Robinson, Editor-in-Chief · Published May 28, 2026

Methodology

Sources. Five publicly available feeds: 511NY (the New York State DOT real-time incident API), NYS Police Troop L (daily PDF blotter covering state-highway incidents), Nassau County Police press releases (NCPD CivicPlus feed), Suffolk County Police press releases (SCPD DNN feed), and Google News RSS aggregated across Long Island traffic-safety queries. Historical context is supplied by the NY Open Data motor-vehicle-crash dataset; that baseline does not feed the live ranking but informs the editorial commentary on each corridor.

Aggregation. We query the events database directly at build time — event_type = 'accident' within the rolling 90-day window, grouped by normalized road slug. The 511NY ingest uses one slug vocabulary (southern-stpkwy, northern-stpkwy), and the editorial roads collection uses another (southern-state-parkway, northern-state-parkway); a road-alias map collapses both into a single canonical corridor so each road counts once.

Scoring. Each corridor's danger score is computed as:

score = crashes × 1.0 + fatalities × 5.0 + DWI arrests × 2.0 + injuries × 0.5

The 5× fatality weight reflects the severity hierarchy that newsrooms and DOT safety analysts use intuitively — a fatal crash is not "one more crash"; it carries weight proportional to the public-safety signal it sends. The 2× DWI weight separates corridors where impaired-driver enforcement is concentrated from corridors where the underlying problem is design or volume. Fatality counts are conservative: we use the larger of (a) the integer fatalities column in events.db, which the 511NY ingest does not populate, and (b) a title-keyword regex on /killed|kills|dies|deadly|fatal/, which catches the editorially-confirmed deaths Scribe enrichment writes to article frontmatter rather than back to the DB.

Caveat. This is open-source aggregation, not the New York State DOT's full TRCC crash report. Numbers reflect what reached our feeds; under-reported incidents on hyper-local roads — county routes, residential streets, town-managed avenues — will appear lower in this ranking than the underlying reality. State highways, parkways, and the LIE are over-represented because they are well-covered by 511NY and NYSP. Treat the ranking as a corridor-level signal, not a per-mile rate.

Update cadence. The longislandtraffic.com autopilot rebuilds the static site every 2 to 4 hours; this page is regenerated from a fresh SQL query on each rebuild. Rendered on May 28, 2026. Every figure in this report is reproducible from /live-events.json (rolling 30-day mirror) and the events.db SQLite file in our ingest package.

The Top 10

  1. 1
    Southern State Parkway (SSP) Score 1,406
    • 705 crashes
    • 110 fatal-titled
    • 161 injuries
    • 35 DWI
    • 994 vehicles

    Known locally as "Long Island's most dangerous parkway" — 110 fatal-titled crashes in 90 days, 35 DWI-tagged incidents confirm the corridor's reputation.

  2. 2
    Long Island Expressway (I-495) Score 314
    • 218 crashes
    • 10 fatal-titled
    • 0 injuries
    • 23 DWI
    • 0 vehicles

    Known locally as "The world's largest parking lot" — 10 fatal-titled crashes in 90 days, 23 DWI-tagged incidents confirm the corridor's reputation.

  3. 3
    Northern State Parkway (NSP) Score 292
    • 234 crashes
    • 3 fatal-titled
    • 69 injuries
    • 4 DWI
    • 396 vehicles

    Exits 35 and 40 carry the bulk of the corridor's incident load; 3 fatal-titled crashes in 90 days in the past 90 days reinforce the long-standing pattern.

  4. 4
    Meadowbrook State Parkway (MSP) Score 156
    • 128 crashes
    • 0 fatal-titled
    • 44 injuries
    • 3 DWI
    • 244 vehicles

    Exit M9 carry the bulk of the corridor's incident load; 128 reported events in the past 90 days reinforce the long-standing pattern.

  5. 5
    Sunrise Highway (NY 27) Score 82
    • 63 crashes
    • 3 fatal-titled
    • 4 injuries
    • 1 DWI
    • 56 vehicles

    Exits 7 and 12 carry the bulk of the corridor's incident load; 3 fatal-titled crashes in 90 days in the past 90 days reinforce the long-standing pattern.

  6. 6
    Sagtikos State Parkway Score 82
    • 72 crashes
    • 0 fatal-titled
    • 19 injuries
    • 0 DWI
    • 137 vehicles

    Exits S1 and S5 carry the bulk of the corridor's incident load; 72 reported events in the past 90 days reinforce the long-standing pattern.

  7. 7
    Wantagh State Parkway Score 63
    • 57 crashes
    • 0 fatal-titled
    • 11 injuries
    • 0 DWI
    • 83 vehicles

    Exit W9 carry the bulk of the corridor's incident load; 57 reported events in the past 90 days reinforce the long-standing pattern.

  8. 8
    Ocean Parkway Score 14
    • 13 crashes
    • 0 fatal-titled
    • 2 injuries
    • 0 DWI
    • 23 vehicles

    Heavy traffic volume make this a chronic incident corridor — 13 reported events in 90 days.

  9. 9
    Sunken Meadow Parkway Score 14
    • 10 crashes
    • 0 fatal-titled
    • 4 injuries
    • 1 DWI
    • 13 vehicles

    Heavy traffic volume make this a chronic incident corridor — 10 reported events in 90 days.

  10. 10
    North Shore Road (Route 25A) (NY 25A) Score 13
    • 8 crashes
    • 1 fatal-titled
    • 0 injuries
    • 0 DWI
    • 0 vehicles

    Heavy traffic volume make this a chronic incident corridor — 1 fatal-titled crash in 90 days in 90 days.

What Makes a Road "Dangerous"

Three forces account for nearly every corridor that climbs to the top of a Long Island danger ranking: design, volume, and enforcement geometry. The Southern State Parkway is the clearest case of design overwhelming the other two. Opened in stages between 1927 and 1949 under Robert Moses, it carries roughly 120,000 vehicles a day across 30 miles of 11-foot lanes, narrow shoulders, and tight 1920s-era interchange geometry. A modern Interstate-standard freeway built for the same traffic volume would have 12-foot lanes, full shoulders, and longer merge weaves. The Southern State has none of those, which is why it consistently records per-mile fatality rates among the highest in New York State despite carrying less than half the daily traffic of the Long Island Expressway.

Volume tells a different story. The LIE absorbs roughly 200,000 vehicles a day across 71 miles and sits firmly in the top tier nationally for commuter delay (per the Texas A&M Transportation Institute Urban Mobility Report). Yet on a per-mile crash-severity basis it is consistently safer than the parkway system. Modern Interstate design — wider lanes, generous shoulders, longer merge weaves, controlled access — is doing its job. That doesn't keep the LIE off this list (sheer volume puts it in the top 3 most months), but it changes the editorial conclusion: the LIE's problem is congestion-driven rear-end collisions, not the structural lethality the Southern State exhibits.

Enforcement geometry is the third lever. New York State Police Troop L has primary patrol jurisdiction across every parkway and the LIE — but they share the long weekend-night DWI burden with Nassau County Police (NCPD) on the Meadowbrook, Wantagh, and Sagtikos, and with Suffolk County Police (SCPD) east of the Suffolk county line. The DWI-arrest concentration in our ranking is partly a measure of where crashes happen, and partly a measure of where patrol cars are. Corridors where Troop L runs sobriety checkpoints on summer weekends will show higher DWI counts even if the underlying impaired-driver rate is no different from a less-patrolled road.

Cross-County Breakdown

The same composite score, filtered to corridors whose road profile includes the respective county. Some corridors (the LIE, Southern State, Northern State) appear on both sides because they cross the Nassau/Suffolk line.

Nassau County — Top 5

  1. Southern State Parkway score 1,406
  2. Long Island Expressway score 314
  3. Northern State Parkway score 292
  4. Meadowbrook State Parkway score 156
  5. Sunrise Highway score 82

Suffolk County — Top 5

  1. Southern State Parkway score 1,406
  2. Long Island Expressway score 314
  3. Northern State Parkway score 292
  4. Sunrise Highway score 82
  5. Sagtikos State Parkway score 82

The current 90-day window covers the late winter/early spring shoulder season into Memorial Day weekend — historically the inflection point where Long Island's road fatality rate begins its summer climb. Casualty rates on the parkway system typically rise 20-30% between Memorial Day and Labor Day relative to the February-April baseline, driven by Hamptons-bound weekend volume on the Southern State and Sunrise Highway, and by impaired-driver incidents on summer weekend nights. Our next monthly composite will capture the full Memorial Day-through-Independence-Day window and is where year-over-year comparisons against the 2025 season become meaningful.

Watch list for the next ranking: any corridor where 30-day crash counts are running more than 15% above the prior 60-day rate. Those are the corridors where a single bad weekend — fog, a holiday DWI cluster, a construction-zone merge change — can swing the monthly ranking by 2-3 positions.

How to Cite This Report

Chicago

Long Island Traffic. "The 10 Most Dangerous Roads on Long Island Right Now." May 2026. https://longislandtraffic.com/editorial/most-dangerous-roads-long-island-2026/.

AP / News-Wire

Per a Long Island Traffic analysis of 90 days of crash, fatality, and DWI data — ranking the Southern State Parkway as the corridor with the highest composite danger score in May 2026 — …

BibTeX

@misc{litraffic_dangerous_roads_2026_05,
  author       = {Robinson, Nate and Long Island Traffic Editorial Team},
  title        = {The 10 Most Dangerous Roads on Long Island Right Now --- May 2026},
  howpublished = {\url{https://longislandtraffic.com/editorial/most-dangerous-roads-long-island-2026/}},
  year         = {2026},
  note         = {Data: 90-day rolling composite over events.db; sources include 511NY, NYSP Troop L, SCPD, NCPD.}
}

Press inquiries, fact-checks, or corrections: corrections@longislandtraffic.com. We turn around corrections within one rebuild cycle (2-4 hours) and post a change-log entry on the corrected article's Updates timeline.

Frequently Asked Questions

What's the most dangerous road on Long Island right now?

In our 90-day composite ranking for May 2026, the #1 corridor is Southern State Parkway (SSP) — a danger score of 1405.5 driven by 705 reported crashes, 110 fatal-titled incidents, 35 DWI-tagged arrests, and 161 reported injuries. Rankings shift weekly as new incidents come in; this is the picture for the 90-day window ending May 28, 2026.

How do you determine the rankings?

We compute a composite danger score per corridor from a single SQL query against the longislandtraffic.com events database: crashes × 1.0 + fatalities × 5.0 + DWI arrests × 2.0 + injuries × 0.5. The 5× fatality weight reflects that a fatal crash carries far more public-safety signal than a fender-bender. The 2× DWI weight separates corridors where impaired-driver enforcement is concentrated. Roads are normalized through an alias map so the 511NY "southern-stpkwy" slug and the editorial "southern-state-parkway" slug collapse to a single corridor. Only roads with a profile page on our site appear in the ranking — every entry links to a hub readers can navigate to.

Where can I see the underlying data?

Every figure on this page is reproducible from https://longislandtraffic.com/live-events.json (rolling 30-day window) and the events.db SQLite file in our packages/ingest pipeline. Individual incidents that contributed to a road's score are linked from each road's own /roads/{slug}/ profile page. Corrections: corrections@longislandtraffic.com — please cite the road slug and the specific claim.

How often is this report updated?

Re-computed at build time. The longislandtraffic.com autopilot pipeline rebuilds the static site every 2 to 4 hours; each rebuild re-runs the SQL query you see in the methodology block below, so the rankings shift continuously as new 511NY incidents, NYSP blotter PDFs, and SCPD/NCPD press releases land in events.db. This page was rendered on May 28, 2026.

Has Long Island's road safety improved or gotten worse?

Honest answer: it depends on the corridor. The Southern State Parkway has carried the #1 or #2 spot in nearly every monthly composite we've run since the autopilot pipeline went live in early 2026; the LIE (I-495) has been remarkably stable in absolute crash counts despite carrying the highest traffic volume on Long Island, which suggests modern interstate design is doing its job. The parkway system — Southern State, Northern State, Meadowbrook, Sagtikos, Wantagh — collectively accounts for the majority of fatal-titled incidents in any given 90-day window. Composite totals in the current window: 1,536 crashes, 127 fatal-titled incidents, 69 DWI-tagged events across the top 17 corridors.