The whole business of red light cameras is pretty dubious to begin with. It seems more like a tool local municipalities use to tax through traffic rather than a means of protecting public safety. https://www.npr.org/sections/thetwo-way/2013/08/13/211723717...
http://abc7ny.com/traffic/new-jersey-drivers-get-huge-christ...
> Since then, a federal lawsuit settlement awarded partial refunds to nearly 500,000 violators, and this year a computer glitch voided more than 10,000 violation notices.
http://www.nj.com/essex/index.ssf/2015/01/newark_netted_over...
> While the cameras in Newark have been turned off, Redflex continues to face a series of legal battles.
> The company’s former CEO was indicted in August on federal corruption charges, alleging she bribed a retired Chicago official in exchange for assistance with the company’s red light camera contracts in that city.
> In a federal lawsuit, a fired company executive has claimed Redflex provided lavish gifts and bribes to government officials in 13 states, including New Jersey, to secure new contracts.
http://blog.nj.com/njv_editorial_page/2009/09/meadowlands_tr...
> With the research conflicting, Fairfax County, Va., sought other ways to reduce red-light violations and related crashes. It found that lengthening an amber light by 1.5 seconds cut red-light violations by 96 percent - a greater reduction than red-light cameras produce. But that's a problem if what you're looking for is ticket revenue.
And I could not find it -- but I clearly remember a Newark/Trenton mayor accidentally saying "We really need the money" when trying to speak for re-instating the cameras.
And then there's the pesky Constitution, which municipalities get around by making the violations civil instead of criminal. Less burden of proof.