Red Light Cameras, Yellow Light Times

More

[Jon Henke]

The Virtuous Republic argues that "red light cameras have nothing to do with safety. They are simply means of taxation that you the voter have no say in." He's talking about this story...

Six U.S. cities have been found guilty of shortening the amber cycles below what is allowed by law on intersections equipped with cameras meant to catch red-light runners. The local governments in question have ignored the safety benefit of increasing the yellow light time and decided to install red-light cameras, shorten the yellow light duration, and collect the profits instead.

Indeed, the incentives involved for the government are very perverse. If you reduce the yellow light duration, you'll get a bit more revenue. If you lengthen the yellow light duration, you'll reduce accidents and save lives. So public officials choose to....reduce yellow light duration?

[insert comment here about the monopoly power of government]

Shortening the yellow light below the minimum time is clearly wrong - i.e., illegal and unethical - but what about the more general disparity in yellow light duration? Some yellow lights last 4 seconds, others 5 seconds, others 6 seconds, etc. How can drivers make the stop/go decision with confidence when there is such a large disparity in yellow light duration?

Even if they don't shorten yellow lights below the minimum, drivers are unlikely to know until after they've been caught just how long a yellow light might be. That also seems problematic from a legal and ethical standpoint. Imagine a law against loitering under which you could be charged (without prior warning) for remaining in one place for too long...but the duration was not posted and you were not informed until after you had been ticketed/arrested. That would be clearly problematic, but how is it very different from the yellow light disparity?

The reason for disparities in yellow light times is obvious (speed, intersection size, etc), but the result is a law about which drivers are forced to make split-second guesses. And cities have an incentive to stack the deck against them.

Jump to comments
Presented by

Megan McArdle is a columnist at Bloomberg View and a former senior editor at The Atlantic. Her new book is The Up Side of Down.

Get Today's Top Stories in Your Inbox (preview)

A Wild Vacation in the Pacific Northwest

A not-so-ordinary road trip, featuring extra-tall art bikes, skateboards, and hand-painted vans


Elsewhere on the web

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register. blog comments powered by Disqus

Video

Adventures in Legal Weed

Colorado is now well into its first year as the first state to legalize recreational marijuana. How's it going? James Hamblin visits Aspen.

Video

What Makes a Story Great?

The storytellers behind House of CardsandThis American Life reflect on the creative process.

Video

Tracing Sriracha's Origin to Thailand

Ever wonder how the wildly popular hot sauce got its name? It all started in Si Racha.

Video

Where Confiscated Wildlife Ends Up

A government facility outside of Denver houses more than a million products of the illegal wildlife trade, from tigers and bears to bald eagles.

Video

Is Wine Healthy?

James Hamblin prepares to impress his date with knowledge about the health benefits of wine.

Video

The World's Largest Balloon Festival

Nine days, more than 700 balloons, and a whole lot of hot air

Writers

Up
Down

More in Business

Just In