From October 19–25, 2026, 511NY listed 30 unplanned full closures on Nassau and Suffolk roads, according to 511NY records stored by Long Island Traffic. That count covers 6 days with complete 511 data. Of those closures, 17 were in Nassau County and 13 were in Suffolk County, the records show.
The longest listing ran 22.4 hours on NY 27A between Amityville and Babylon, according to the 511NY records. The Long Island Expressway had the most unplanned full closures, with 7, and 25 of the 30 unplanned closures started overnight, Long Island Traffic’s 511NY data shows.
Long Island Expressway led with 7 unplanned full closures
The Long Island Expressway logged 7 unplanned full closures during the week, the most of any road, according to 511NY records stored by Long Island Traffic. NY 878 followed with 6 and the Wantagh State Parkway with 5, the records show.
NY 25A had 4 unplanned full closures, and the Southern State Parkway had 3, according to the same 511NY data. No road on the list had a planned full closure for roadwork or events, the records show.
Full closures by road (top 10)
| Road | Unplanned | Planned (roadwork or events) |
|---|---|---|
| Long Island Expressway | 7 | 0 |
| NY 878 | 6 | 0 |
| Wantagh State Parkway | 5 | 0 |
| NY 25A | 4 | 0 |
| Southern State Parkway | 3 | 0 |
| Sunrise Highway | 2 | 0 |
| NY 27A | 1 | 0 |
| NY 347 | 1 | 0 |
| NY 454 | 1 | 0 |
NY 27A closure listed 22.4 hours between Amityville and Babylon
A “Road closed” listing on NY 27A in both directions between Grand Central Avenue in Amityville and Ocean Avenue in Babylon stayed on the feed longest, according to 511NY records stored by Long Island Traffic. 511NY reported it at 10:50 p.m. Friday, Oct. 23, and LIT last recorded it at 9:15 p.m. Saturday, Oct. 24, for 22.4 hours listed, the records show.
NY 25A eastbound in Smithtown, between Woodlawn Avenue and Edgewood Avenue, appeared on the list twice, according to the 511NY records. One listing was reported at 10:22 p.m. Monday, Oct. 19, and last listed at 5:52 a.m. Tuesday, Oct. 20, for 7.5 hours. The other was reported at 10:17 p.m. Tuesday, Oct. 20, and last listed at 5:53 a.m. Wednesday, Oct. 21, for 7.6 hours, the records show.
On the Southern State Parkway, an eastbound closure between Exit 41A, the Sagtikos State Parkway, and Exit 43N, NY 111, in Islip was listed for 6.9 hours, according to the 511NY data. See Southern State Parkway live conditions and history.
Longest-listed unplanned full closures, Nassau and Suffolk, October 19–25, 2026
| Road | Direction | Where (per 511NY) | Cause (511NY wording) | Reported (ET) | Last listed (ET) | Hours listed |
|---|---|---|---|---|---|---|
| NY 27A | Both directions | between Grand Central Avenue (Amityville) and Ocean Avenue (Babylon) | Road closed | Fri 10/23 10:50 p.m. | Sat 10/24 9:15 p.m. | 22.4 |
| NY 25A | Eastbound | between Myrtle Avenue; Stewart Avenue (Huntington) and Prime Avenue; Spring Road (Huntington) | Road closed | Thu 10/22 8:21 p.m. | Fri 10/23 4:07 a.m. | 7.8 |
| NY 25A | Eastbound | between Woodlawn Avenue (Smithtown) and Edgewood Avenue; Ramp (Smithtown) | Road closed | Tue 10/20 10:17 p.m. | Wed 10/21 5:53 a.m. | 7.6 |
| NY 25A | Eastbound | between Woodlawn Avenue (Smithtown) and Edgewood Avenue; Ramp (Smithtown) | Road closed | Mon 10/19 10:22 p.m. | Tue 10/20 5:52 a.m. | 7.5 |
| NY 878 | Southbound | between Rock Hall Road (Hempstead) and Burnside Avenue (CR 10) (Hempstead) | Road closed | Fri 10/23 11:11 p.m. | Sat 10/24 6:31 a.m. | 7.3 |
| NY 25A | Westbound | between Green Street (Huntington) and West Neck Road; Woodbury Road (Huntington) | Road closed | Mon 10/19 10:45 p.m. | Tue 10/20 5:52 a.m. | 7.1 |
| NY 878 | Southbound | between Burnside Avenue (CR 10) (Hempstead) and Atlantic Beach Bridge (Lawrence) | Road closed | Thu 10/22 10:58 p.m. | Fri 10/23 6:00 a.m. | 7 |
| Southern State Parkway | Eastbound | between Exit 41A - Sagtikos State Parkway (Islip) and Exit 43N - NY 111 (Islip) | Road closed | Tue 10/20 10:11 p.m. | Wed 10/21 5:03 a.m. | 6.9 |
25 of 30 unplanned closures started overnight
511NY reported 25 of the 30 unplanned full closures as starting overnight, between 10 p.m. and 5:59 a.m., according to records stored by Long Island Traffic. Another 4 started in the afternoon or evening, 3–9:59 p.m., and 1 started in the morning, 6–9:59 a.m., the records show.
No unplanned full closure started at midday, between 10 a.m. and 2:59 p.m., according to the 511NY data.
Full closures by the time 511NY reported them starting (Eastern)
| Start time | Unplanned | Planned (roadwork or events) |
|---|---|---|
| Overnight (10 p.m.–5:59 a.m.) | 25 | 0 |
| Morning (6–9:59 a.m.) | 1 | 0 |
| Midday (10 a.m.–2:59 p.m.) | 0 | 0 |
| Afternoon and evening (3–9:59 p.m.) | 4 | 0 |
Every unplanned closure carried the 511NY label “Road closed”
All 30 unplanned full closures carried the 511NY cause wording “Road closed,” according to records stored by Long Island Traffic. The median closure under that label was listed for 6.5 hours, the records show.
511NY kept 28 of the unplanned full closures listed for 3 hours or more, according to the same data.
Unplanned full closures by cause
| Cause (511NY wording) | Closures | Median hours listed | Longest (hours) |
|---|---|---|---|
| Road closed | 30 | 6.5 | 22.4 |
No planned roadwork closures listed in real time this week
511NY listed 0 planned full closures for roadwork or events in real time October 19–25, 2026, according to records stored by Long Island Traffic. The prior week, October 12–18, 2026, had 26 planned full closures, the records show. Current work zones are on the current Long Island road work zones page.
This week averaged 5 unplanned full closures per counted day, compared with 1.5 per day over the previous 4 weeks, according to the 511NY data. Long Island Traffic began reading 511NY’s new system on October 2, 2026, and records before and after that date come from different versions of the 511NY feed, according to Long Island Traffic.
Full closures by week (days with missing 511 data excluded)
| Week (ET) | Days counted | Unplanned | Unplanned per day | Median hours listed (unplanned) | Planned |
|---|---|---|---|---|---|
| October 19–25, 2026 | 6 | 30 | 5 | 6.5 | 0 |
| October 12–18, 2026 | 7 | 5 | 0.7 | 6.7 | 26 |
| October 5–11, 2026 | 7 | 2 | 0.3 | 3.5 | 26 |
| September 28–October 4, 2026 | 3 | 3 | 1 | 0.8 | 15 |
| September 21–27, 2026 | 7 | 25 | 3.6 | 1.8 | 23 |
How we measured this
- Records: 511NY records on Nassau and Suffolk roads whose description says all lanes were closed or blocked (or “Road closed”), with a 511 start time from 12:00 a.m. October 19 through 11:59 p.m. October 25 (Eastern). Queens is excluded.
- Long Island Traffic checks the 511NY feed about once an hour. “Hours listed” runs from the start time 511NY reported to the last hourly check that still listed the closure; the next check no longer had it.
- Unplanned closures are those 511NY attributes to crashes, downed trees, poles or wires, flooding, police or fire activity, spills, water-main breaks or emergency repairs. Closures 511NY attributes to roadwork, maintenance or events are counted as planned. Causes are 511NY’s own wording.
- Advance construction schedules (one 511 notice covering a week of nightly work) are not counted; only closures 511NY listed while they were in effect are.
- Two records on the same road, direction and cause whose listings overlap are counted once, keeping the longer listing.
- Days on which 511NY data was missing or incomplete are left out of this week and of the comparison weeks, and the weeks are compared per counted day.
Limitations
- 511NY data was missing or incomplete on Sep 30, 2026, Oct 1, 2026, Oct 2, 2026, Oct 4, 2026 and Oct 24, 2026 (a 511NY outage or capture gap). Those days are left out; 6 days are counted this week and 24 in the previous four weeks.
- Long Island Traffic began reading 511NY’s new system on October 2, 2026. Records before and after that date come from different versions of the 511NY feed, and whether the two record incidents at the same rate has not yet been measured, so a change across that date may partly reflect the switch.
- “Hours listed” is how long 511NY kept the closure on its feed, measured to about an hour. It is not an official reopening time: 511NY can clear a record before or after every lane reopens.
- Lane status is the last one 511NY showed. A closure that was partly reopened before its record cleared may not be counted as a full closure, and some closures never reach 511NY.
- Causes are 511NY’s labels at the time of listing, not findings from police or crash investigations.
- Closures on local and village streets are counted only when 511NY lists them, which is mostly state roads, parkways and county roads.