This may be illegal under sovereign immunity, though they could attempt to sue a county or municipality.<p>In Florida, a long-contested issue over red light cameras resulted in a judgement that having their tickets contested in special City Hall hearings, rather than through state traffic laws, was illegal. If a similar case is happening here, they could attempt that lawsuit, and if they win, then attempt their class-action.<p>You also have to get around statute of limitations and notice of claim limits for new york, not to mention shared liability. Remember: New York City parking violation tickets can be disputed as defective without going to court. You can even request an online hearing! So a court may throw out any argument that a class-action lawsuit might claim that it was unreasonable for _all_ of those people to be unable to file a dispute.<p>Interestingly, I found this brochure on their website that mentions code 67 (pedestrian ramps), but does not at all mention the exception for ramps in the middle of the street with no sign or marked walkway. It should really have been updated after 2008: <a href="http:&#x2F;&#x2F;www1.nyc.gov&#x2F;assets&#x2F;finance&#x2F;downloads&#x2F;pdf&#x2F;translations&#x2F;got_tickets_english.pdf" rel="nofollow">http:&#x2F;&#x2F;www1.nyc.gov&#x2F;assets&#x2F;finance&#x2F;downloads&#x2F;pdf&#x2F;translation...</a>