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The Legislature may be on the verge of passing a law laying the groundwork for red-light traffic cameras.

Although the measure headed for conference committee doesn’t yet appropriate money for the cameras to ticket motorists,  does give the Hawaii Department of Transportation the guidance to create a “red light running committee to develop any recommendations” for future implementation.

“The prevalence of drivers violating Hawaii’s traffic laws has become intolerable,” the bill states and few could argue with that. According to National Highway Traffic Safety Administration data, at least  on Hawaii’s roads over the last two decades.

��𳦱�Գٱ���,��a pickup crash on Ala Moana Boulevard claimed the lives of three pedestrians and injured three others, a “carnage” that has mobilized state and county officials to  to reduce fatalities in Hawaii.

Like many public safety devices, red-light cameras are intended to psychologically deter bad behavior. The cameras debuted in the mid-1960s, and since then have become a staple of many municipalities around the world.

The theory is that if rational motorists perceive they are being watched and can be instantly sanctioned for breaking the law, they won’t break the law in the first place.

But like with all government interventions, unforeseen and unintended consequences frustrate the effectiveness of these systems.

For one thing, the most egregious breaches of public safety aren’t committed by rational actors, but by irrational or impaired actors, as was the case with the crash in Ala Moana. Most citizens are already conscious of the law and the need to operate a vehicle safely, since the perceived costs of paying for car repairs, serving prison time for manslaughter or dealing with lawsuits is deterrent enough to make a good effort to behave on the road.

Poor street design, bad traffic light timing and increasing congestion also impact the way motorists act on the road. Many drivers may feel that Hawaii’s streets are designed in a way that if they don’t maneuver decisively or charge out when an opportunity arises, they might be stuck waiting longer than they find acceptable.

And red-light cameras can punish motorists who might be honestly trying to obey the law but end up at the wrong place and the wrong time because of factors beyond their control.

“In some locales, it generates more crashes as many motorists make early and sudden stops at the onset of the yellow light.” — Panos Prevedouros, University of Hawaii

As someone who has received a gazillion tickets, I know all too well how easy it already is to get one in Hawaii. When people in Honolulu ask me to explain my political beliefs, I joke that I’m a “Marco Rubio Republican,” as I have even more .

Machines, unlike human police officers, have a binary logic that don’t consider circumstances and automatically dole out tickets when pre-programmed conditions are met. This forces citizens into yet another “tell-it-to-the-judge” rite of passage, but most individuals would rather pay a fine than have to subject themselves to a traffic court.

Randal O’Toole, a senior fellow at the CATO Institute, warns that red-light timing is the real issue.

“Cities that shorten the yellow phase of traffic signals when installing red-light cameras are clearly more interested in generating revenue than safety,” he wrote in an email. “Companies that make and operate red-light cameras actually encourage cities to make such adjustments to increase their revenue streams.”

Panos Prevedouros, professor and chair of civil and environmental engineering at the University of Hawaii, says a red-light camera “marginally addresses a city’s traffic safety problems.”

“In some locales, it generates more crashes as many motorists make early and sudden stops at the onset of the yellow light,” Prevedouros said in an email. “It’s complexity and ability to generate hundreds of citations per hour become both a large expense to the city and a large ‘tax’ burden to its residents and visitors … these systems have no special ability to cite speeders, and intoxicated and distracted drivers who are the typical culprits in crashes.”

���� of red-light cameras conducted by the Federal Highway Administration’s research and technology division similarly found that “the positive effects on angle crashes of RLC systems is partially offset by negative effects related to increases in rear end crashes.”

A better way to improve road safety requires “equal amounts of engineering, education and enforcement,” Prevedouros says.

Hawaii’s state and local elected officials should move carefully on implementing policies that might further complicate our already untenable situations on the roads. Politicians love to pass new traffic laws because it presents a narrative that action is being taken, but good government needs to take into consideration the bigger picture.

When we have better cities and better streets, we will almost certainly have better drivers.