Alternate-side parking is NYC’s mechanism for letting the Department of Sanitation clean the gutters. Every block has cleaning rules posted on the curb signs — typically a two-hour window on certain days, like “Monday and Thursday, 9:30 a.m. to 11 a.m.” During that window, parked cars must move to the opposite side of the street. After the window ends, you can move back.
That’s the daily reality. The complication is the calendar overlay: roughly 60-70 days a year, DOT suspends the rules entirely. On a suspension day, you can leave your car parked through what would normally be the cleaning window. The 2026 calendar has 67 planned suspensions, which is why this works as a tool — the rules change often enough that “should I move my car today?” is a real, recurring question.
What counts as a suspension day
Suspensions fall into a few buckets:
- Major legal holidays — federal holidays plus a handful of NYC-recognized observances. New Year’s Day, MLK Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, Christmas Day. These suspend ASP without exception.
- Religious observances — DOT recognizes a list that includes Asian Lunar New Year, Good Friday, Eid al-Fitr, Eid al-Adha, Passover (1st, 2nd, 7th, 8th days), Shavuot, Rosh Hashanah, Yom Kippur, Sukkot, Shemini Atzeret, Simchat Torah, Diwali, and a few others. These all suspend ASP for the day.
- Weather emergencies — snowstorms severe enough that DOT calls a citywide snow operation. These are issued in real time and not on the published calendar. The mayor’s office and DSNY post the announcement.
Other things don’t suspend ASP: weekday parades (mostly), most political events, Election Day, and minor weather events. The list of suspension days isn’t intuitive — it’s specifically what DOT publishes, no more.
“Suspended” vs “in effect” vs “no rules today”
Three distinct states:
- In effect — your block’s normal cleaning rules apply today. You need to move your car during the posted window. This is the default state on most weekdays.
- Suspended — today is a DOT-published suspension day (holiday or religious observance). Your block’s normal cleaning rules don’t apply today even though the sign on the curb doesn’t say so. You can leave your car parked.
- No rules today — your block’s posted ASP rules don’t include today. For most blocks, this is Sundays (no ASP). Some blocks have ASP only one day a week; the other days are “no rules today.”
The distinction between “suspended” and “no rules today” matters because tickets get issued by patrol officers who sometimes get the call wrong. If you got a ticket on a suspended day, fight it — the DOT suspension calendar is the official record, and tickets issued in violation of an announced suspension are routinely dismissed on appeal.
Reading the curb sign
Curb signs are notoriously cryptic. The two things to verify:
- Which days the rule applies to. “Mon Thu 9:30am - 11am” means Monday and Thursday only. If today is Tuesday, the rule doesn’t apply today (and the block is in “no rules today” state).
- The time window. If the window is 9:30am to 11am, you can park before 9:30am and after 11am the same day. You only need to move during the window itself.
A common mistake: assuming “Mon Thu 9:30am - 11am” means you can’t park at all on Monday or Thursday. You can — you just can’t park during the 9:30-11 window. Once 11am hits and the sweeper has come through, you can park back in your original spot until the next scheduled cleaning.
How to actually park legally without losing your mind
Tips from people who’ve done this for years:
- Move your car on the night before, not the morning of. Once the “double-park is OK because cleaning’s about to start” window opens (typically 30 minutes before the posted window), spots open up on the opposite side. Move then and you can sleep in.
- Check the suspension calendar weekly. Many people have been ticketed for moving their car on a day cleaning was actually suspended — a painful, irreversible waste of effort. Bookmark the SuperNYC parking page and check it before you move.
- If you double-park (legal during the cleaning window once the sweeper has passed), stay with the car. Sanitation can write tickets for unattended double-parked cars even mid-cleaning.
- Garages run about $400-$700/month in most NYC neighborhoods, $800+ in Manhattan. If you value time at any reasonable rate, the garage math is usually better than people think.
The SuperNYC alternate-side parking page gives you the daily status — suspended, in effect, or no rules today — plus the full 2026 calendar of planned suspensions. It’s the thing to check before you assume you need to move your car.