What Actually Wins a Street Cleaning Ticket Appeal in Chicago

Two reasons account for nearly all the wins — and one avoidable mistake cost over a thousand drivers their case before the facts were even considered.

Built from Chicago’s own hearing records, obtained under the Freedom of Information Act. Last updated August 20, 2026.

About 25% of mailed challenges to Chicago street cleaning tickets end with the driver found not liable. That comes from 18,169 decided cases — mailed challenges to tickets issued between 2023 and 2025. Street cleaning is one of the hardest ticket types to beat in this city.

But the losses are not random. The city's hearing records show exactly which reasons officers used when they ruled each way. That makes it possible to see what actually moves the needle — and what wastes your time.

What wins, and how often

Two reasons cover nearly all the not-liable rulings.

Together, signage and factual inconsistency account for nearly all of the wins. If your situation does not fit one of those two categories, the remaining reasons are rare.

Signs were Missing or Obscured is the single most common path to a not-liable ruling. But it is also the most contested ground. The ticketing officer photographs the posted sign at the time of the citation. That photo is what the hearing officer puts on the other side of your claim. A letter that just says "I didn't see a sign" is not the same as evidence that no sign was there. If you go this route, a dated photo of the entire block — corner to corner — is what the argument actually needs.

Violation is Factually Inconsistent covers situations where something about the ticket itself does not match reality: wrong block, wrong date, wrong vehicle description. If the facts on the ticket are simply wrong, this is the reason to name.

What loses

The largest single loss category — 51% of liable rulings — is simply that the officer found the violation happened. The second largest, at 40%, is that the officer found the sign was posted and visible. Those are losses on the facts, and there is no avoiding them if the evidence does not support your case.

The avoidable loss

The third reason is worth its own paragraph: 1,217 drivers — 9% of all losses — were recorded as "Failed to Select one of the Codified Defenses." Those drivers did not lose because the officer weighed the evidence and disagreed. They lost because their letter never named one of the specific defenses the ordinance actually recognizes. The city's hearing process requires you to pick from a defined list. A general explanation of your situation, or a request for leniency, does not count as selecting a defense. The hearing officer has no path to rule in your favor.

What to do right now

1. Find the city's list of codified defenses before you write a single word of your letter. Your response must name at least one of them. This is the step that 1,217 people skipped.
2. Choose a defense that matches your actual situation. The two that work most often are signage and factual inconsistency. Do not name a defense just because it sounds good.
3. Attach evidence. A bare denial — "I didn't do it" — is among the weakest things you can send. The officer has a signed citation and photos. You need a document on your side too.
4. Do not accidentally admit the violation. Explaining your situation honestly is good. Saying something like "I know there was a sign but I was only there for a few minutes" supplies the element the city needs to prove its case.
5. Watch the deadline. Under city ordinance, an unpaid ticket doubles 25 days after the city finds you liable. The deadline matters as much as the argument.

Street cleaning tickets are hard to beat. But the records show that the cases won were won for specific, documentable reasons — and that a meaningful share of the losses were avoidable before anyone looked at the facts.

SELECT disposition, COUNT(*) AS cases FROM hearings WHERE violation_code IN ('0964040B', '0964040')
      AND contest_method = 'Mail'
      AND CAST(substr(issue_datetime,
  instr(issue_datetime, '/') + 1
  + instr(substr(issue_datetime, instr(issue_datetime,'/')+1), '/'), 4) AS INTEGER) BETWEEN 2023 AND 2025
      AND disposition IN ('Not Liable', 'Liable') GROUP BY 1sql

SELECT reason, COUNT(*) AS cases
    FROM hearings
    WHERE violation_code IN ('0964040B', '0964040')
      AND contest_method = 'Mail'
      AND CAST(substr(issue_datetime,
  instr(issue_datetime, '/') + 1
  + instr(substr(issue_datetime, instr(issue_datetime,'/')+1), '/'), 4) AS INTEGER) BETWEEN 2023 AND 2025
      AND disposition = 'Not Liable'
    GROUP BY 1 ORDER BY cases DESCsql

SELECT reason, COUNT(*) AS cases
    FROM hearings
    WHERE violation_code IN ('0964040B', '0964040')
      AND contest_method = 'Mail'
      AND CAST(substr(issue_datetime,
  instr(issue_datetime, '/') + 1
  + instr(substr(issue_datetime, instr(issue_datetime,'/')+1), '/'), 4) AS INTEGER) BETWEEN 2023 AND 2025
      AND disposition = 'Liable'
    GROUP BY 1 ORDER BY cases DESCsql