Dr. Dao Yuan Han
Data Editor & Lead AnalystLong Island Traffic
About
Dr. Han holds a PhD in Mathematics specializing in differential geometry and geometric partial differential equations. He applies rigorous quantitative methods to Long Island Traffic's crash data — identifying high-risk corridors, temporal patterns, and statistical anomalies that inform evidence-based road safety reporting. His analyses combine NY Open Data crash records, 511NY real-time feeds, and historical DOT statistics.
Credentials
PhD Mathematics (Differential Geometry) · Published Researcher · Data Science
Links
Role at Long Island Traffic
As Data Editor & Lead Analyst, Dr. Han applies rigorous quantitative methods to Long Island's crash data. He identifies statistical patterns, high-risk corridors, and anomalies across NY Open Data records, 511NY feeds, and DOT datasets — translating raw numbers into evidence-based safety insights that drive the site's analytical reporting.
Published Analyses
May 21, 2026 Lightning Strikes Longwood High School in Yaphank, Sparks Gymnasium Ceiling Fire — Storm Aftermath Across Suffolk County Lightning from the May 20, 2026 severe thunderstorm struck Longwood High School in Yaphank, igniting a fire in the gymnasium ceiling. Suffolk County firefighters were still battling the blaze after 10 PM. The storm has passed Long Island but left a trail of downed trees, minor road flooding, and localized power outages. PSEG Long Island reporting near-100% service restored. May 21, 2026 PSEG Long Island's Reliability Has Gotten Worse — Now It Has to Survive a 60 MPH Storm As a severe thunderstorm with 60 mph winds batters Long Island tonight, newly published data shows PSEG Long Island's reliability has actually worsened since 2021 — even as executive bonuses climbed significantly. Long Island ratepayers are paying more, getting less, and heading into a potentially brutal overnight outage event. May 21, 2026 LaGuardia Sinkhole + Storm = Memorial Day Travel Nightmare — Hundreds of Flights Canceled, Delays Spreading Nationwide LaGuardia's Runway 4/22 closure from Wednesday's sinkhole combined with the overnight severe thunderstorm to trigger hundreds of cancellations spreading as far as Chicago, Atlanta, and Dallas. Long Island travelers face a brutal pre-Memorial Day morning. May 21, 2026 LIRR's First Night Back From Strike Hits Severe Storm — Long Island Commuters Face Double Disruption Just 36 hours after the LIRR strike ended, Long Island Rail Road riders face a new threat: a severe thunderstorm with 60-70 mph winds crossing Nassau and Suffolk Counties tonight, plus ongoing LaGuardia closure and NJ Transit suspension at Penn Station. May 21, 2026 MTA Board Approves 13% Refund for LIRR Monthly Ticket Holders After 4-Day Strike The MTA Board approved an approximately 13% refund for LIRR May monthly ticket holders after four days of suspended service. Refund will be automatically applied. May 20, 2026 VIDEO: Car Submerged on Jackie Robinson Parkway — Good Samaritan Rescues Trapped Occupants as NYC Roads Become Impassable Dramatic video shows a man leaving his vehicle to rescue people from a submerged car on the Jackie Robinson Parkway in Queens. With the LIE, Hillside Ave, Atlantic Ave, and now the Jackie Robinson all flooded, every route from NYC to Long Island is effectively cut off. May 20, 2026 VIDEO: 'Dangerous Levels of Flash Flooding' in Forest Hills — Trains Down, Pedestrians Wading Through a Foot of Water Multiple videos show dangerous flash flooding in Forest Hills, Queens near the Queens Blvd/LIE interchange. Subway trains are down, pedestrians are wading through at least a foot of water. Resident calls for investment in stormwater systems: 'This is our new normal.' May 20, 2026 "How Many People Just Died?" — Homes Flooding at Merrick & Liberty Ave, Queens With Zero Emergency Alerts Sent Residents report homes flooding at Merrick Ave and Liberty Ave in Queens with FDNY rushing to respond. No Wireless Emergency Alert or NotifyNYC notification was sent to phones. The city's failure to warn residents during the worst flooding in years is drawing outrage. May 20, 2026 Long Island's Sinkhole Problem Is Real: Three Ground Collapses in Six Days and the Geology That Makes It Worse A 10-foot sinkhole swallowed a car on the LIE in Melville. Six days later, a LaGuardia runway collapsed and a school bus got stuck in the Bronx. Dr. Dao Yuan Han analyzes why Long Island's glacial geology makes it more sinkhole-prone than most New Yorkers realize — and why this week wasn't a fluke. May 20, 2026 Severe Thunderstorm Batters Staten Island: Trees Down on Tracks, SIR Suspended, Outerbridge Crash, and Hundreds Lose Power A severe thunderstorm swept across Staten Island Wednesday evening with 60 mph wind gusts, downing trees across the borough, suspending Staten Island Railway service between Prince's Bay and New Dorp, triggering a crash that blocked all lanes of the Outerbridge Crossing, and cutting power to hundreds of Con Edison customers. May 20, 2026 LIVE: Storm Damage Roundup — Trees Down, Flooding, Power Outages Across NYC and Long Island (Updating) Rolling roundup of storm damage from the May 20, 2026 severe thunderstorm. 10,700+ PSEG customers affected; 2,529 still without power overnight. LIRR 13% monthly refund approved. May 20, 2026 VIDEO: Bushwick, Brooklyn Flash Flood — Wilson & Stockholm Streets Submerged After Severe Thunderstorm Flash flooding turns Bushwick streets into rivers after May 20 severe thunderstorm. Video shows Wilson and Stockholm intersection completely submerged. Brooklyn, Queens, and western Long Island bearing the brunt of tonight's storm. May 20, 2026 PHOTOS + VIDEO: Massive Shelf Cloud Rolls Over Long Island — 'Haven't Seen One Like This Probably Ever' A dramatic shelf cloud formation preceded tonight's severe thunderstorm as it crossed Long Island. Video and photos capture the ominous wall of cloud signaling 60 mph winds, hail, and flash flooding now hitting Nassau and Suffolk Counties. May 20, 2026 VIDEO: Queens Streets Underwater — Pedestrians Wade Through Ankle-Deep Flooding on Flushing Avenue Torrential rain from tonight's severe thunderstorm turned Flushing Avenue in Jamaica, Queens into a river. Video shows pedestrians wading through ankle-deep water as storm drains overflow. Long Island commuters heading through Queens face major delays. May 20, 2026 WATCH: Wrong-Way Driver on the Long Island Expressway Captured on Dashcam — LIE's Growing Safety Crisis Dashcam footage shows a wrong-way driver barreling down the Long Island Expressway. The terrifying video comes the same day an East Setauket man admitted to a DWI crash on the LIE that fractured a woman's skull and left her permanently blind in one eye. May 20, 2026 Severe Thunderstorm Warning: 60 MPH Winds and Hail Hit NYC and Long Island — Expect Flooding After a Week of Sinkholes NWS issues severe thunderstorm warning for Brooklyn, Manhattan, Staten Island with 60 mph winds and hail. Long Island under threat as storms push east. Flash flooding risk elevated after 4 sinkholes in 7 days exposed fragile infrastructure. May 20, 2026 LaGuardia Airport Sinkhole Shuts Down Runway — What Long Island Travelers Need to Know Two NYC sinkholes in one day: LaGuardia Runway 4/22 closed and a school bus with 39 kids trapped in the Bronx. Expect flight delays, cancellations, and increased road traffic for Long Island commuters. May 15, 2026 Best Apps for Real-Time Traffic Updates on Long Island (2026 Guide) The definitive comparison of every traffic and navigation app for Long Island — Google Maps, Waze, Apple Maps, 511NY, and Long Island Traffic — ranked by use case for parkway commuters, beach traffic, fleet operators, and LIRR riders. May 15, 2026 Top 10 Traffic Safety Tips for Long Island Drivers (2026 Data-Driven Guide) Ten evidence-based safety habits for Long Island drivers, ranked by impact on real crash patterns from 10,000+ NY Open Data records, 511NY feeds, and structural analysis of Nassau and Suffolk roads. May 15, 2026 Traffic Management Solutions for Long Island Businesses (2026 Operations Guide) May 15, 2026 How to File an Insurance Claim After a Long Island Car Accident (2026 Guide) Step-by-step Long Island auto insurance claim guide: no-fault NF-2 within 30 days, MV-104 within 10 days, IME rules, serious-injury threshold, denial appeals, and the mistakes that cost Long Island drivers the most. May 15, 2026 Long Island Road Closures and Construction: The Complete 2026 Guide Where Long Island construction zones cluster, the weekly and seasonal patterns, the alternates that actually work on the LIE, Southern State, and Sunrise — with the live construction directory built in. May 15, 2026 Cheapest Gas on Long Island: The Complete 2026 Price Guide Where to find the cheapest fuel in Nassau and Suffolk County, why prices vary by town, the day-of-week pattern, and which Costco / BJ's locations save the most — with the Long Island Gas Price Directory built in. May 15, 2026 Long Island Roadside Assistance: Comparing the Top Providers (2026 Guide) Side-by-side editorial comparison of every major Long Island roadside assistance option — AAA, insurance-bundled, automaker, app-based, credit card — ranked by parkway response, tow distance, and Nassau and Suffolk coverage. May 15, 2026 Best Tire Shop Services Near You for Long Island Drivers (2026 Guide) May 15, 2026 How to Handle a Car Accident on Long Island (Step-by-Step 2026 Guide) May 15, 2026 The Best Vehicle Safety Features for Long Island Roads (2026 Guide) The definitive Long Island vehicle safety guide: which ADAS features actually matter on the Southern State Parkway, LIE, and Sunrise Highway, ranked by real-world crash exposure with NHTSA, IIHS, and 511NY data. May 3, 2026 Rony Yahir Alvarenga Rivera Charged in Fatal Island Park, Valley Stream Stabbings Nassau police say Rony Yahir Alvarenga Rivera is accused in two fatal stabbings hours apart in Island Park and Valley Stream, including one at a Wendy's on Austin Boulevard. May 2, 2026 LIRR or Drive? The Safety Tradeoff Behind Long Island Commutes May 2, 2026 Pedestrian and Bicyclist Crashes on Long Island: The 91-Record Warning May 2, 2026 DWI Crashes on Long Island: What 458 Incident Records Show May 2, 2026 LIE vs. Southern State: Which Long Island Commute Is Riskier? Mar 24, 2026 The Southern State Parkway Problem: Why One Road Leads Long Island in Fatal Crashes Mar 24, 2026 Nassau vs. Suffolk: Comparing Crash Rates Across Long Island Data analysis comparing accident rates, severity patterns, and road safety metrics between Nassau and Suffolk counties using 10,000+ crash records from NY Open Data. Mar 24, 2026 Long Island's Most Dangerous Roads: A Data-Driven Analysis