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Second Nexus © 2019
[DIGEST: IFL Science!, Priceonomics, Washington Post, Slate]
If you’ve ever spent time in the car waiting to turn left against a steady flow of traffic, thinking there has to be a better way, you’re not alone.
<p><span style="font-weight: 400;">Left turns can be not only frustrating, the U.S. Department of Transportation </span><a href="https://www.washingtonpost.com/news/innovations/wp/2014/04/09/the-case-for-almost-never-turning-left-while-driving/?utm_term=.d7d8350054e3"><span style="font-weight: 400;">finds</span></a><span style="font-weight: 400;"> them to be downright dangerous: Ten times as many accidents occur during left-hand turns as opposed to right.</span></p><p><div id="action_button_container"></div></p><p><span style="font-weight: 400;">Perhaps no one is more acutely aware of this than the world’s largest package delivery and logistics company, UPS, which has outright banned left turns for its drivers.</span></p><p><span style="font-weight: 400;">That’s right—UPS drivers </span><a href="http://www.iflscience.com/editors-blog/why-ups-drivers-dont-turn-left-and-you-probably-shouldnt-either/"><span style="font-weight: 400;">don’t</span></a><span style="font-weight: 400;"> turn left, unless it’s in a low-traffic residential neighborhood or conditions dictate it’s absolutely necessary.</span></p><p><span style="font-weight: 400;">Since eliminating left-hand turns from its vehicle-routing software in 2004, UPS has </span><a href="https://www.youtube.com/watch?v=Sfo4IooBsRc&feature=youtu.be"><span style="font-weight: 400;">reported</span></a><span style="font-weight: 400;"> increased profits, reduced emissions and decreased accidents. With a fleet of more than 100,000 trucks and vans delivering more than 18 million packages every day worldwide, this change is not insignificant: The company was able to save 10 million gallons of gas annually simply by taking only right turns.</span></p><p><div data-conversation-spotlight=""></div></p><p class="shortcode-media shortcode-media-rebelmouse-image"><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMjAzNzM0Mi9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY1NDQxOTgxNX0.zwAfb0ylWeSJuPpTmm4OAn3AD-9RyamePBBX8HqKRg8/img.png?width=980" id="be380" class="rm-shortcode" data-rm-shortcode-id="e8cb5aaad78137074d5a0a7285935bc2" data-rm-shortcode-name="rebelmouse-image"><small class="image-media media-caption" placeholder="add caption...">Credit: <a href="https://assets.rbl.ms/22037342/origin.png">Source</a>.</small></p><p><span style="font-weight: 400;">Though it seems counterintuitive to have drivers go in what may be the opposite direction of their destination, UPS has found the strategy cuts delays and gas consumption primarily by eliminating the need to wait for gaps in traffic.</span></p><p><span style="font-weight: 400;">“Left turns create some concerns when it comes to generating potential for congestion, back-up traffic flow, safety, accident situations,” Phil Caruso, deputy executive director for technical programs at the Institute of Transportation Engineers,</span> <a href="https://www.washingtonpost.com/news/innovations/wp/2014/04/09/the-case-for-almost-never-turning-left-while-driving/?utm_term=.7e3b9cc79561"><span style="font-weight: 400;">told</span></a> <i><span style="font-weight: 400;">The Washington Post</span></i><span style="font-weight: 400;">. “So if you can eliminate left turns, especially concurrent left turns, that’s a positive.”</span></p><p><span style="font-weight: 400;">Tom Vanderbilt, author of the national bestseller </span><i><span style="font-weight: 400;">Traffic: Why We Drive the Way We Do (and What It Says About Us)</span></i><span style="font-weight: 400;">, agrees, </span><a href="https://www.washingtonpost.com/news/innovations/wp/2014/04/09/the-case-for-almost-never-turning-left-while-driving/?utm_term=.7e3b9cc79561"><span style="font-weight: 400;">calling left turns</span></a><span style="font-weight: 400;"> “the bane of traffic engineers.”</span></p><p></p><p><a href="http://www.slate.com/articles/life/transport/2011/07/dont_turn_left.single.html"><span style="font-weight: 400;">According to Vanderbilt</span></a><span style="font-weight: 400;">, left turns aren’t only a safety and efficiency issue for drivers, but for cities as well: “The left-turning vehicle presents not only the aforementioned safety hazard, but a coagulation in the smooth flow of traffic. It's either a car stopped in an active traffic lane, waiting to turn; or, even worse, it's cars in a dedicated left-turn lane that, when traffic is heavy enough, requires its own ‘dedicated signal phase,’ lengthening the delay for through traffic as well as cross traffic. And when traffic volumes really increase, as in the junction of two suburban arterials, </span><i><span style="font-weight: 400;">multiple</span></i><span style="font-weight: 400;"> left-turn lanes are required, costing even more in space and money.”</span></p><p><span style="font-weight: 400;">Further, the Discovery Channel show </span><i><span style="font-weight: 400;">MythBusters</span></i><span style="font-weight: 400;"> did its</span><a href="http://www.discovery.com/tv-shows/mythbusters/videos/right-turn-only-minimyth/"><span style="font-weight: 400;"> own investigation</span></a><span style="font-weight: 400;"> into the efficiency of a right-turn-only policy, mapping two “delivery” routes around the hills of San Francisco, one including left turns, and one hewing to UPS’s traffic-mapping software, making only right turns. The crew then weighed their truck’s fuel tank before and after each route.</span></p><p class="shortcode-media shortcode-media-rebelmouse-image"><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMjAzNzM0My9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYxOTkyMjU0NX0.tkumkDx49vkScpJYRdj093DT5vBpqYOGoneZgzuOd8U/img.jpg?width=980" id="569e7" class="rm-shortcode" data-rm-shortcode-id="ccb4f10c022a7283e68aabee6372a2a4" data-rm-shortcode-name="rebelmouse-image"><small class="image-media media-caption" placeholder="add caption...">Credit: <a href="http://www.reviewjournal.com/life/two-local-ups-drivers-pull-hall-fame-pristine-driving-records">Source</a>.</small></p><p><span style="font-weight: 400;">The findings? The right-turn-only route did indeed take longer than the traditional route, but it only used 4 lbs. of fuel, compared with 6.8 lbs. of fuel burned by taking the route that included left-hand turns—a significant increase in efficiency. </span></p><p><span style="font-weight: 400;">Though UPS drivers do take left turns more often than the </span><i><span style="font-weight: 400;">MythBusters </span></i><span style="font-weight: 400;">crew did, </span><a href="https://priceonomics.com/why-ups-trucks-dont-turn-left/"><span style="font-weight: 400;">drivers estimate</span></a><span style="font-weight: 400;"> nearly 90 percent of their turns are right ones.</span></p><p><span style="font-weight: 400;">As an anonymous driver</span> <a href="https://priceonomics.com/why-ups-trucks-dont-turn-left/"><span style="font-weight: 400;">told</span></a> <span style="font-weight: 400;">ABC: “We really, really hate left turns at UPS."</span></p>
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