Autoblog

Florida DOT quietly changed yellow-light standards, municipalities issuing more tickets

Jonathon Ramsey — Wed, 15 May 2013 19:15:00 EST

Filed under: Government/Legal, Safety, Videos

Red light cameras don't appear to be going away, so it should come as no surprise that neither are the controversies around them. We're told again and again that they're about safety, not revenue collection, yet year after year, the studies and headlines compete to support and tear down those arguments. An investigative report by Florida's WTSP Channel 10 News gets the maelstrom whirling again, having found that various state municipalities have shorted yellow light times to below those recommended by the US Department of Transportation.

The retiming of yellow lights was precipitated by a change the Florida Department of Transportation (FDOT) made to its guidelines for yellow-light durations. Until 2011, the regulations "mandated yellow light calculations factor in either the posted speed limit or 85th percentile of drivers' actual speed - whichever was greater." That year, though, the phrase "whichever was greater" was cut, and certain cities began resetting the yellow lights to illuminate for the shorter interval - either trying to ensure more safety or more revenue. The FDOT says the new language was only meant to establish a minimum time for yellow lights, not to dictate their exact duration.

Various US government studies and reports recommend not using a road's speed limit when determining the length of the yellow light because it increases violations and crashes, but instead using the traffic's 85th percentile speed or the speed limit plus ten miles per hour.

More than one study has found that people want red light cameras, studies have also shown that while major accidents have been reduced at intersections with cameras, smaller fender-bender accidents have increased, and that's not an isolated finding. And with so much money in play - the Channel 10 news report says Florida collect about $100 million in red light camera fines last year and could get to $130 million this year - it's no wonder cities shorten yellow light times below the minimum guidelines, manipulate accident data, robo-sign tickets with the names of dead police officers, and redesign their license plates to make them easier for the cameras to read.

Check out the news segment in the video below and head over to the WTSP site for all of the numbers and specifics, and if you're in Florida, you'll need to pay even more attention to the lights in front and the traffic behind.

Continue reading Florida DOT quietly changed yellow-light standards, municipalities issuing more tickets

Florida DOT quietly changed yellow-light standards, municipalities issuing more tickets originally appeared on Autoblog on Wed, 15 May 2013 19:15:00 EST. Please see our terms for use of feeds.

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LA traffic lights get in sync to ease congestion [w/video]

Zach Bowman — Tue, 26 Feb 2013 09:30:00 EST

Filed under: Government/Legal, Safety, Videos

Los Angeles is moving forward with a plan to ease traffic congestion by synchronizing all of the city's 4,398 stoplights. While smaller municipalities have followed similar plans in the past, LA is the first major city to take a stab at getting all of its lights to play nice together. If it works, the new system could increase average traffic speeds by 16 percent and reduce travel times by 12 percent. We imaging reducing the amount of time cars spend idling at a stop light should help reduce fuel consumption by a decent margin as well.

LA Mayor Antonio Villaraigosa has said the move will reduce the city's carbon emissions by one metric ton while saving drivers one day of waiting in traffic at the same time. The system can also be utilized by emergency responders to reduce response times for ambulances and fire trucks. You can watch a local news report on the switchover below.

Continue reading LA traffic lights get in sync to ease congestion [w/video]

LA traffic lights get in sync to ease congestion [w/video] originally appeared on Autoblog on Tue, 26 Feb 2013 09:30:00 EST. Please see our terms for use of feeds.

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How insects might help make traffic lights smarter and more efficient

George Kennedy — Mon, 12 Nov 2012 08:28:00 EST

Filed under: Safety, Technology

Anyone who has ever driven some of our nation's more congested areas may argue that sitting in traffic for hours at a time is not natural human behavior, and they may be right. In fact, negotiating traffic may be more of the provence of insects, as a Gizmag report suggests.

Apparently, ants, bees and termites are all able to manage their traffic flow. The example given is ants, where the smaller of two converging groups will always defer to the larger group. According to Ozan Tonguz, a telecommunications researcher at Carnegie Mellon University, this instinctual behavior has potential applications in our traffic infrastructure.

The Virtual Traffic Lights system has been in development since 2009, and it would be able to determine which of two cars (or groups of cars) approaching a traffic light was larger and allow that group to proceed first. Once the larger group had passed, the smaller group would be allowed to go. According to Tonguz's simulations, this program could reduce commute times by 40 to 60 percent, not to mention the reduction in carbon emissions from a shorter commute time. This initiative has received $2 million, and a spin-off company has been created to help make it a reality.

Dresden University of Technology and ETH Zurich have come together on a similar system that would allow existing traffic lights to communicate with vehicles to improve traffic flow.

Sitting at a red light while the lane with the green can be frustrating and waste fuel. Let us hope these smart red light systems can be implemented everywhere soon.

How insects might help make traffic lights smarter and more efficient originally appeared on Autoblog on Mon, 12 Nov 2012 08:28:00 EST. Please see our terms for use of feeds.

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Unintended Consequence of Technology: New LED traffic lights can't melt snow

Michael Harley — Wed, 16 Dec 2009 17:31:00 EST

Filed under: Etc., Safety, Technology

Traffic lights using state-of-the-art LED illumination use 90 percent less electricity, offer a much longer service life and are more durable than their incandescent counterparts. Taking advantage of the countless benefits, cities around the country have been replacing traditional filament-based traffic signal bulbs with LEDs for years. Unfortunately, the low-watt LED units burn much cooler than its white-hot counterpart making it unable to melt snow off weather exposed traffic fixtures.

"I've never had to put up with this in the past," said Duane Kassens, a driver from Indiana who was involved in an accident attributed to a snow-clogged traffic light. "The police officer told me the new lights weren't melting the snow. How is that safe?" It obviously isn't.

Municipalities around the country are taking different steps to keep their signals shining brightly in the face of Mother Nature. Crews in St. Paul, Minnesota, use compressed air to keep their lights clean. In Green Bay, Wisconsin, city workers brush the snow off by hand in a labor-intensive process. Until a fix arrives, it is best to take the advice of Dave Hansen, a traffic engineer with the Green Bay Department of Public Works. Treat a blocked signal as if the power is out. "If there's any question, you err on the side of caution," says Hansen.

[Source: AOL Autos | Image: Oswego Police]

Unintended Consequence of Technology: New LED traffic lights can't melt snow originally appeared on Autoblog on Wed, 16 Dec 2009 17:31:00 EST. Please see our terms for use of feeds.

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