New Technologies Contribute to National Driving Decline, Policy Needs to Catch Up
In a first-of-its-kind study, U.S. Public Interest Research Group (U.S. PRIG) compiled nation-wide evidence on transportation apps and vehicle sharing programs, and found that these advanced new tools have made it easier for Americans to drive less. Real-time apps and on-board wi-fi for public transit, as well as carsharing, bikesharing and ridesharing have spread rapidly in recent years while driving has declined.
The report, A New Way to Go: The Apps, Maps, and New Technologies that are Giving More Americans Freedom to Drive Less, examines new evidence on how these practices are changing travel behavior.
“Mobility used to be all about driving a personal car” said Phineas Baxandall with U.S. PIRG. “For Baby Boomers, driving one’s car represented freedom and spontaneity. Today–especially for younger people–owning a car is likely to represent big expenses and parking hassles."
"Meanwhile, technology and vehicle-sharing are making it easier not to own a car or for households to drive less," Baxandall continued. "Public transit systems, especially with on-board wi-fi and real-time apps, can be the backbone of this new mobility.”
The report, sheds additional light on how Americans have been driving less per-person for eight years in a row and total miles remain below 2005 levels (Federal highway data).
Among the findings cited in the report:
- Public transit enhancements—A majority of U.S. transit systems make scheduling publicly available for developers to produce smartphone apps to help riders navigate systems. Smartphone-based tools enable riders to find the best route and track the progress of trains and buses in real time.
- Bikesharing—More than 30 cities now have programs where subscribers can access bikes by the minute or by subscription at kiosks located on city streets. Approximately 40 percent of bikeshare members report reducing their driving, according to a survey of members of four bikeshare services.
- Carsharing—Roundtrip carsharing services, such as Zipcar as well as newer one-way services such as car2go enable subscribers to access cars located in their neighborhoods, providing the mobility benefits of access to a car without having to bear the burden of owning one. As of 2012, more than 800,000 Americans were members of carsharing services. Each carsharing vehicle replaces nine to 13 privately-owned vehicles. The average carsharing participant reduces his or her driving by 27 to 56 percent while increasing ridership on transit and biking.
- Ridesharing and taxi-like services—New peer-to-peer carsharing networks enable individuals to rent out their own unused vehicles to people looking for a car. Drivers with open seats in their cars can pair with other individuals who need a ride. Companies such as Lyft allow ordinary drivers to provide web-based taxi-like services during their spare time.
Young Americans have consistently been the first to adopt and test these new technologies and practices. As of September 2012, young adults were six times more likely to have a smartphone than their grandparents’ generation, and twice as likely as Americans 50 to 64 years of age.
“As more Americans are searching for ways reduce driving and incorporate physical activity into their lives, they need information on how to get out of their cars and onto the sidewalks, bike lanes and rail tracks," said U.S. Rep. Blumenauer (D-OR) in a statement about the report. "This report outlines ways they can do that. I recommend that anybody across the country who’s making decisions about transportation read these recommendations and hop on board with those of us who already know that the cheapest gallon of gasoline is the one you don’t have to buy.”
Findings from a separate report released today by the American Public Transit Association (APTA) reinforce those from U.S.PIRG. APTA’s study, Millennials & Mobility revealed that 70 percent of adults under 35 use multiple alternatives instead of the car several times or more per week. Millennials view public transit as the superior mode for digital multitasking, and a majority view transit-based wi-fi and mobile broadband as well as real-time information about bus and train locations as important.
“Now is the time to be pro-active in creating this multi-modal transportation system to address the Millennial generation’s demands and lifestyles," said Michael Melaniphy, president and CEO of the APTA. "This generation wants the pragmatic benefits of having multiple ways to get around.”
“In the past, people often saw little choice but to depend on personal automobiles. And once you’ve already paid for a car and insurance, then it’s harder to consider other choices,” said Baxandall. “The new tools make it easier not to own a car or to own fewer cars. New apps make it easy to catch a bus and ride unfamiliar routes. Bikeshare or rideshare can be the perfect complement when public transit doesn’t reach nearby your destination, when weather changes, or unexpected errands arise.”
The report provides policy makers with a number of recommendations such as to install more wi-fi on public transit and to integrate bike and car sharing into traffic management plans and locate near transit stations. Highway expansion projects should be reconsidered and canceled if no longer justified.
“These technological tools and practices are still in their infancy but spreading fast. Government leaders should focus less on expanding highway capacity and more on public transit, biking, walking and other alternatives to personal cars,” said Baxandall.
Visit EcoWatch’s HEALTH page for more related news on this topic.
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By Jacob L. Steenwyk and Antonis Rokas
From the mythical minotaur to the mule, creatures created from merging two or more distinct organisms – hybrids – have played defining roles in human history and culture. However, not all hybrids are as fantastic as the minotaur or as dependable as the mule; in fact, some of them cause human diseases.
When Looking Through a Microscope Isn’t Close Enough.<p>For the last few years, <a href="http://www.rokaslab.org/" target="_blank">our team at Vanderbilt University</a>, <a href="https://www.researchgate.net/lab/Gustavo-Goldman-Lab" target="_blank">Gustavo Goldman's team at São Paulo University in Brazil</a> and many other collaborators around the world have been collecting samples of fungi from patients infected with different species of <em>Aspergillus</em> molds. One of the species we are particularly interested in is <a href="https://doi.org/10.1006/rwgn.2001.0082" target="_blank"><em>Aspergillus nidulans</em>, a relatively common and generally harmless fungus</a>. Clinical laboratories typically identify the species of <em>Aspergillus</em> causing the infection by examining cultures of the fungi under the microscope. The problem with this approach is that very closely related species of <em>Aspergillus</em> tend to look very similar in their broad morphology or physical appearance when viewing them through a microscope.</p><p>Interested in examining the varying abilities of different <em>A. nidulans</em> strains to cause disease, we decided to analyze their total genetic content, or genomes. What we saw came as a total surprise. We had not collected <em>A. nidulans</em> but <em>Aspergillus latus</em>, a close relative of <em>A. nidulans</em> and, as we were to soon find out, <a href="https://doi.org/10.1016/j.cub.2020.04.071" target="_blank">a hybrid species that evolved through the fusion of the genomes</a> of two other <em>Aspergillus</em> species: <em>Aspergillus spinulosporus</em> and an unknown close relative of <em>Aspergillus quadrilineatus</em>. Thus, we realized not only that these patients harbored infections from an entirely different species than we thought they were, but also that this species was the first ever <em>Aspergillus</em> hybrid known to cause human infections.</p>
Several Different Fungal Hybrids Cause Human Disease.<p>Hybrid fungi that can cause infections in humans are well known to occur in several different lineages of single-celled fungi known as yeasts. Notable examples include multiple different species of <a href="https://doi.org/10.1002/yea.3242" target="_blank">yeast hybrids</a> that cause the human diseases <a href="https://rarediseases.info.nih.gov/diseases/6218/cryptococcosis" target="_blank">cryptococcosis</a> and <a href="https://www.cdc.gov/fungal/diseases/candidiasis/index.html" target="_blank">candidiasis</a>. Although pathogenic yeast hybrids are well known, our discovery that the <em>A. latus</em> pathogen is a hybrid is a first for molds that cause disease in humans.</p>
(Left) Candida yeasts live on parts of the human body. Imbalance of microbes on the body can allow these yeasts, some of which are hybrids, to grow and cause infection. (Right) Cryptococcus yeasts, including ones that are hybrids, can cause life-threatening infections in primarily immunocompromised people. Centers for Disease Control and Prevention<p><a href="https://doi.org/10.1371/journal.ppat.1008315" target="_blank">Why certain <em>Aspergillus</em> species are so deadly</a> while others are harmless remains unknown. This may in part be because <a href="https://doi.org/10.1016/j.fbr.2007.02.007" target="_blank">combinations of traits, rather than individual traits</a>, underlie organisms' ability to cause disease. So why then are hybrids frequently associated with human disease? Hybrids inherit genetic material from both parents, which may result in new combinations of traits. This may make them more similar to one parent in some of their characteristics, reflect both parents in others or may differ from both in the rest. It is precisely this mix and match of traits that hybrids have inherited from their parental species that <a href="https://www.nytimes.com/2010/09/14/science/14creatures.html" target="_blank">facilitates their evolutionary success</a>, including their ability to cause disease.</p>
The Evolutionary Origin of an Aspergillus Hybrid.<p>Multiple evolutionary paths can lead to the emergence of hybrids. One path is through mating, just as the horse and donkey mate to create a mule. Another path is through the merging or fusion of genetic material from cells of different species.</p><p>It is this second path that appears to have been taken by our fungus. <em>A. latus</em> appears to have two of almost everything compared to its parental species: twice the genome size, twice the total number of genes and so on. But unlike other hybrids, which are often sterile like the mule, we found that <em>A. latus</em> is capable of reproducing both asexually and sexually.</p><p>But how distinct were the parents of <em>A. latus</em>? By comparing the parts contributed by each parent in the <em>A. latus</em> genome, we estimate that its parents are approximately 93% genetically similar, which is about as related as we humans are with lemurs. In other words, <em>A. latus</em>, an agent of infectious disease, is the fungal equivalent of a human-lemur hybrid.</p>
How A. Latus Differs From its Parents.<p>Elucidating the identity of closely related fungal pathogens and how they differ from each other in infection-relevant characteristics is a key step toward reducing the burden of fungal disease. For example, we found that <em>A. latus</em> was three times more resistant than <em>A. nidulans</em>, the species it was originally identified as using microscopy-based methods, to one of the most common antifungal drugs, <a href="https://www.drugbank.ca/drugs/DB00520" target="_blank">caspofungin</a>. This result provides a clear example of the potential importance of accurate identification of the <em>Aspergillus</em> pathogen causing an infection.</p><p>We also examined how <em>A. latus</em> and <em>A. nidulans</em> interact with cells from our immune system. We found that immune cells were less efficient at combating <em>A. latus</em> compared to <em>A. nidulans</em>, suggesting the hybrid fungus may be trickier for our immune systems to identify and destroy.</p><p>In the midst of the COVID-19 pandemic, our quest to understand <em>Aspergillus</em> pathogens is becoming more urgent. Growing evidence suggests that <a href="https://doi.org/10.1111/myc.13096" target="_blank">a fraction of COVID-19 patients are also infected with <em>Aspergillus</em>.</a> More worrying is that these <a href="https://doi.org/10.3201/eid2607.201603" target="_blank">secondary <em>Aspergillus</em> infections</a> can worsen the clinical outcomes for those infected with the novel coronavirus. That being said, we stress that little is known about <em>Aspergillus</em> infections in COVID-19 patients due to a lack of systematic testing, and none of the infections identified so far appear to have been caused by hybrids.</p><p>So, when it comes to hybrids, some are fantastic (the minotaur), some are helpful (the mule) and some are dangerous (<em>Aspergillus latus</em>). Understanding more about the biology of <em>Aspergillus latus</em> may help in our understanding of how microbial pathogens arise and how to best prevent and combat their infections.</p>
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