Posts tagged with "Transport":

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Will the rise of self-driving vehicles signal the death of the traffic light?

The dawn of self driving cars promises to be an exciting new era for transport. However, what exactly lies ahead is still up for debate. Researchers at the Massachusetts Institute of Technology (MIT), the Swiss Institute of Technology (ETHZ), and the Italian National Research Council (CNR) have outlined how traffic signals could be rendered obsolete if automated vehicles get their way. The development is known as "slot-based intersections," and if realized, would significantly reduce queuing, delays, and pollution. If evidence from any science fiction movie is anything to go by, it's that humans have very little trust in automated technology. It's easy to picture: panic as your self-driving car appears to be careering into another, only to miss by a a tiny margin, all perfectly predicted by an automated system of course. That may be an exaggeration, but Professor Carlo Ratti, Director of the MIT Senseable City Lab and his team have produced a model that shows cars zipping through a four-way intersection both without stopping or slowing down and remaining unscathed. “Traffic intersections are particularly complex spaces, because you have two flows of traffic competing for the same piece of real estate,” he said in a press release regarding the study, published in detail here. “But a slot-based system moves the focus from the traffic level to the vehicle level. Ultimately, it’s a much more efficient system, because vehicles will get to an intersection exactly when there is a slot available to them.” Trust in such a system would have to be high. Communication between cars would have to be flawless and safety measures for failure would also have to be in place. That said, if implemented, the system would speed up journey time and also reduce pollution by cutting down on the time spent idle at traffic signals. Of course, signal-less interchanges already exist, they're called roundabouts. But the possibility for human error (and hence collisions) still exists in the roundabout, along with the need to give way to others.
"Slot-based intersections are similar to slot-based management systems used for air-traffic control," say the team. "Upon approaching an intersection, a vehicle automatically contacts a traffic management system to request access. Each self-driving vehicle is then assigned an individualized time or “slot” to enter the intersection." Speed limits could also change. If a perfect system can plot every movement, why not travel at the fastest, yet safest, possible speed? This is just one of the questions arising as self-driving cars become more and more likely to enter our lives. Would car lanes also be made thinner? Vehicles won't be making mistakes so why not cram as many in as we can and maximize efficiency? In terms of having a central traffic organizing system, getting different car manufacturers to be completely open with each other is another major bridge that would need to be crossed. And as for the more pressing issue of automated vehicles' interaction with humans, MIT's Senseable City Lab responds by saying: "slot-based intersections are flexible and can easily accommodate pedestrian and bicycle crossing with vehicular traffic."
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Enrique Peñalosa plans to give Bogotá the best transit system in the developing world

An economist who once advised Colombian President Virgilio Barco, Enrique Peñalosa is now a revered urban planner in the city of Bogotá. Having once served as Bogotá mayor from 1997 to 2001, Peñalosa is now back for his second stint and pledges to provide his city with the best public transportation system in the developing world. In his first term as mayor, Peñalosa was responsible for widespread changes in infrastructure and public space in Bogotá. These included a 40 percent reduction in vehicle usage within the city; replacing parking spaces with green sidewalks and street furniture; developing the TransMilenio bus rapid transit systems; building a major public library alongside two others in low-income areas; and creating expansive green spaces. Peñalosa also pioneered regulation on social housing that included a minimum square footage on new builds. Dario Hidalgo of CityFix sings the new mayors praises, citing how the bus rapid transit system (BRT) is "one of the world’s most heavily used", with over 2 million passengers a day using the service. Like any good economist, Peñalosa is a strong supporter of efficiency and growth. Now, with his self-laid foundations,Bogotá can begin to move forward again. Not dwelling on the past, he has plans to upgrade the BRT system, merging it with the rail network as well implementing more bus lanes. On top of this, Peñalosa plans on doubling bicycle usage in Bogotá. Naturally, when a such changes are proposed, the issue of financing these changes surfaces. An estimated $13-20 billion is required with the state being left to cough up $7.1 billion after accounting for all government revenue streams. The solution? Peñalosa is seeking to implement fees for personal automobile travel into the city, similar to the congestion charge in London (which has generated $1.42 billion since 2003). Despite these possible methods of financing, it is very possible that the new Mayor will turn to the private sector to secure further funding in order to secure the implementation of the new services.
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Routemaster 2.0

The City of London unveiled a new version of its iconic red doubledecker bus today, replacing the Routemasters everyone knows and loves. Which was a little surprising, as we thought Transit London had already selected the ever-so-British team of Norman Foster and Aston Martin 17 months ago. But apparently that was just an ideas competition while this, as the video above shows, is the real deal. Set to hit the road by 2012—just in time for the Olympics, no less—the new buses are the work of Thomas Heatherwick and Wrightbus. In addition to being super sleek, the new buses are super sustainable hybrids. Get on board after the jump.