Marchetti’s constant

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Supertall: How the World's Tallest Buildings Are Reshaping Our Cities and Our Lives by Stefan Al

3D printing, autonomous vehicles, biodiversity loss, British Empire, Buckminster Fuller, carbon footprint, Cesare Marchetti: Marchetti’s constant, colonial rule, computer vision, coronavirus, COVID-19, Deng Xiaoping, digital twin, Disneyland with the Death Penalty, Donald Trump, Easter island, Elisha Otis, energy transition, food miles, Ford Model T, gentrification, high net worth, Hyperloop, invention of air conditioning, Kickstarter, Lewis Mumford, Marchetti’s constant, megaproject, megastructure, Mercator projection, New Urbanism, plutocrats, plyscraper, pneumatic tube, ride hailing / ride sharing, Salesforce, self-driving car, Sidewalk Labs, SimCity, smart cities, smart grid, smart meter, social distancing, Steve Jobs, streetcar suburb, synthetic biology, Tacoma Narrows Bridge, the built environment, the High Line, transit-oriented development, Triangle Shirtwaist Factory, tulip mania, urban planning, urban sprawl, value engineering, Victor Gruen, VTOL, white flight, zoonotic diseases

With autonomous vehicles, hyperloops, and aerial ridesharing in the near future, we may be up for a wild ride! Plus, along with it, land that was previously less desirable will become the development hot spots of tomorrow. New mobility systems will change our cities and buildings once again. In 1994, Italian physicist Cesare Marchetti described a principle, now known as “Marchetti’s constant.” He found that, in general, people are willing to commute for about one hour a day, or a half-hour one way. Since Neolithic times, people kept the average time spent for travel the same, even when transportation advances allowed them to increase their distance. This idea has had far-reaching effects on our cities.

This may lead to the explosive growth of metropolitan areas. You could commute from your office in downtown Los Angeles to Las Vegas, where prices are lower, and live in a bigger home. The race will be on for the first hyperloop-integrated skyscraper. Autonomous vehicles (AVs) could desensitize people to distance, possibly lengthening Marchetti’s “constant” of commuting time. Without having to attend to the wheel, you can now sleep in your car, or conduct online meetings there. Perhaps you can live a little farther away and buy a cheaper home? In other words, cities will increasingly sprawl out. The increase of telecommuting, accelerated by COVID-19, may have a similar impact.

While hyperloops are faster, they probably won’t come close to the transport efficiency of the good old subway. Hyperloops can carry 3,360 passengers an hour.29 A single subway can carry more than ten times as many people. (While it might not carry as many people, a hyperloop’s higher speeds would prevent people from otherwise taking a more carbon-intensive ride.) If Marchetti’s constant continues to hold, building new developments around faster forms of mobility may further encroach on untouched land, destroying habitats and threatening ecosystems. But there is another option. Access is a function of proximity and mobility. Instead of focusing on new mobility, we can increase access with proximity, by more densely packing activities or with a larger variety of uses.


pages: 603 words: 182,781

Aerotropolis by John D. Kasarda, Greg Lindsay

3D printing, air freight, airline deregulation, airport security, Akira Okazaki, Alvin Toffler, An Inconvenient Truth, Asian financial crisis, back-to-the-land, barriers to entry, Bear Stearns, Berlin Wall, big-box store, blood diamond, Boeing 747, book value, borderless world, Boris Johnson, British Empire, business cycle, call centre, carbon footprint, Cesare Marchetti: Marchetti’s constant, Charles Lindbergh, Clayton Christensen, clean tech, cognitive dissonance, commoditize, company town, conceptual framework, credit crunch, David Brooks, David Ricardo: comparative advantage, Deng Xiaoping, deskilling, digital map, disruptive innovation, Dr. Strangelove, Dutch auction, Easter island, edge city, Edward Glaeser, Eyjafjallajökull, failed state, financial engineering, flag carrier, flying shuttle, food miles, Ford Model T, Ford paid five dollars a day, Frank Gehry, fudge factor, fulfillment center, full employment, future of work, Future Shock, General Motors Futurama, gentleman farmer, gentrification, Geoffrey West, Santa Fe Institute, George Gilder, global supply chain, global village, gravity well, Great Leap Forward, Haber-Bosch Process, Hernando de Soto, high-speed rail, hive mind, if you build it, they will come, illegal immigration, inflight wifi, intangible asset, interchangeable parts, Intergovernmental Panel on Climate Change (IPCC), intermodal, invention of the telephone, inventory management, invisible hand, Jane Jacobs, Jeff Bezos, Jevons paradox, Joan Didion, Kangaroo Route, Kickstarter, Kiva Systems, knowledge worker, kremlinology, land bank, Lewis Mumford, low cost airline, Marchetti’s constant, Marshall McLuhan, Masdar, mass immigration, McMansion, megacity, megaproject, Menlo Park, microcredit, military-industrial complex, Network effects, New Economic Geography, new economy, New Urbanism, oil shale / tar sands, oil shock, One Laptop per Child (OLPC), peak oil, Pearl River Delta, Peter Calthorpe, Peter Thiel, pets.com, pink-collar, planned obsolescence, pre–internet, RFID, Richard Florida, Ronald Coase, Ronald Reagan, Rubik’s Cube, savings glut, Seaside, Florida, Shenzhen special economic zone , Shenzhen was a fishing village, Silicon Valley, Silicon Valley startup, SimCity, Skype, smart cities, smart grid, South China Sea, South Sea Bubble, sovereign wealth fund, special economic zone, spice trade, spinning jenny, starchitect, stem cell, Steve Jobs, Suez canal 1869, sunk-cost fallacy, supply-chain management, sustainable-tourism, tech worker, telepresence, the built environment, The Chicago School, The Death and Life of Great American Cities, the long tail, The Nature of the Firm, thinkpad, Thomas L Friedman, Thomas Malthus, Tony Hsieh, trade route, transcontinental railway, transit-oriented development, traveling salesman, trickle-down economics, upwardly mobile, urban planning, urban renewal, urban sprawl, vertical integration, Virgin Galactic, walkable city, warehouse robotics, white flight, white picket fence, Yogi Berra, zero-sum game

When he finished Peachtree Center in 1976, the result was a hermetically sealed “Center” central to nothing except its clones elsewhere. He had built the urban equivalent of a hub, profitable and infinitely repeatable anywhere. And with that, his LEGO-block approach became the reigning vernacular in Airworld’s peculiar geography of nowhere. Kasarda’s Law and Marchetti’s Constant It wasn’t supposed to be this way. Technology was going to ground us by linking and shrinking the world, and in doing so set us free. The world would flatten. Road warriors would beat their platinum medallions into plowshares. It hasn’t happened. For twenty years, we’ve heard how e-mail and videoconferencing— relabeled “telepresence”—would eliminate the need for cross-country meetings.

But as horse trams came along, followed by electric trams, then subways, and finally cars, the city’s periphery raced away from its Enlightenment-era core. Berlin’s diameter was effectively ten times wider in 1950 than it was 150 years earlier, yet it still took only an hour to traverse. The rule has since been dubbed Marchetti’s Constant. Marchetti contended that transportation, not communications, was the “unifying principle of the world.” Ratifying Kasarda’s Law, he attested that the “so-called explosion in communication during the last 20 years did not dent transportation expansion; on the other hand, they tend to move together.”

A group called the Future Forum predicted there will be 1.5 million people working in the U.K. but living overseas by 2016, commuting daily or weekly between London and Barcelona, Marrakech, Dubrovnik, Verona, Palma, Pula, and Valencia. Dallas residents know the drill. Started here in 1973, Southwest Airlines was the template for Ryanair and every low-fare carrier since. The combination of deregulation, cheap tickets, and gratuitous expense accounts has brought air travel well within range of Marchetti’s Constant, hence consultant expresses and Jim Tam’s perambulating across Texas. Consider Angela Kim, who commutes from Houston to Dallas every Tuesday to babysit her grandson for a few days while her daughter the physician pulls back-to-back shifts for her residency. Occasionally she lands, scoops him up at the curb, and boards the next 250-mile, fifty-five-minute flight back to Dallas.


pages: 578 words: 168,350

Scale: The Universal Laws of Growth, Innovation, Sustainability, and the Pace of Life in Organisms, Cities, Economies, and Companies by Geoffrey West

"World Economic Forum" Davos, Alfred Russel Wallace, Anthropocene, Anton Chekhov, Benoit Mandelbrot, Black Swan, British Empire, butterfly effect, caloric restriction, caloric restriction, carbon footprint, Cesare Marchetti: Marchetti’s constant, clean water, coastline paradox / Richardson effect, complexity theory, computer age, conceptual framework, continuous integration, corporate social responsibility, correlation does not imply causation, cotton gin, creative destruction, dark matter, Deng Xiaoping, double helix, driverless car, Dunbar number, Edward Glaeser, endogenous growth, Ernest Rutherford, first square of the chessboard, first square of the chessboard / second half of the chessboard, Frank Gehry, Geoffrey West, Santa Fe Institute, Great Leap Forward, Guggenheim Bilbao, housing crisis, Index librorum prohibitorum, invention of agriculture, invention of the telephone, Isaac Newton, Jane Jacobs, Jeff Bezos, Johann Wolfgang von Goethe, John von Neumann, Kenneth Arrow, laissez-faire capitalism, Large Hadron Collider, Larry Ellison, Lewis Mumford, life extension, Mahatma Gandhi, mandelbrot fractal, Marc Benioff, Marchetti’s constant, Masdar, megacity, Murano, Venice glass, Murray Gell-Mann, New Urbanism, Oklahoma City bombing, Peter Thiel, power law, profit motive, publish or perish, Ray Kurzweil, Richard Feynman, Richard Florida, Salesforce, seminal paper, Silicon Valley, smart cities, Stephen Hawking, Steve Jobs, Stewart Brand, Suez canal 1869, systematic bias, systems thinking, technological singularity, The Coming Technological Singularity, The Death and Life of Great American Cities, the scientific method, the strength of weak ties, time dilation, too big to fail, transaction costs, urban planning, urban renewal, Vernor Vinge, Vilfredo Pareto, Von Neumann architecture, Whole Earth Catalog, Whole Earth Review, wikimedia commons, working poor

This surprising observation of the approximately one-hour invariant that communal human beings have spent traveling each day, whether they lived in ancient Rome, a medieval town, a Greek village, or twentieth-century New York, has become known as Marchetti’s constant, even though it was originally discovered by Zahavi. As a rough guide it clearly has important implications for the design and structure of cities. As planners begin to design green carless communities and as more cities ban automobiles from their centers, understanding and implementing the implied constraints of Marchetti’s constant becomes an important consideration for maintaining the functionality of the city. 4. THE INCREASING PACE OF WALKING Zahavi and Marchetti presumed that for a given mode of transportation, such as walking or driving, travel speed did not change with city size.

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pages: 472 words: 80,835

Life as a Passenger: How Driverless Cars Will Change the World by David Kerrigan

3D printing, Airbnb, airport security, Albert Einstein, autonomous vehicles, big-box store, Boeing 747, butterfly effect, call centre, car-free, Cesare Marchetti: Marchetti’s constant, Chris Urmson, commoditize, computer vision, congestion charging, connected car, DARPA: Urban Challenge, data science, deep learning, DeepMind, deskilling, disruptive innovation, Donald Shoup, driverless car, edge city, Elon Musk, en.wikipedia.org, fake news, Ford Model T, future of work, General Motors Futurama, hype cycle, invention of the wheel, Just-in-time delivery, Lewis Mumford, loss aversion, Lyft, Marchetti’s constant, Mars Rover, megacity, Menlo Park, Metcalfe’s law, Minecraft, Nash equilibrium, New Urbanism, QWERTY keyboard, Ralph Nader, RAND corporation, Ray Kurzweil, ride hailing / ride sharing, Rodney Brooks, Sam Peltzman, self-driving car, sensor fusion, Silicon Valley, Simon Kuznets, smart cities, Snapchat, Stanford marshmallow experiment, Steve Jobs, technological determinism, technoutopianism, TED Talk, the built environment, Thorstein Veblen, traffic fines, transit-oriented development, Travis Kalanick, trolley problem, Uber and Lyft, Uber for X, uber lyft, Unsafe at Any Speed, urban planning, urban sprawl, warehouse robotics, Yogi Berra, young professional, zero-sum game, Zipcar

The lack of road safety also costs up to 5 percent of countries’ GDP, mostly affecting the poorest ones.[316] Most developing countries are still far from being as car-centric as the developed world. City travel is still mostly composed of walking, bicycling and public transport, much more in line with Marchetti’s constant. It is probably preferable if these cities do not replicate the urban mistakes of others, as to multiply them on the scale of Mexico City or Rio would not be feasible. The driverless car might help save developing countries from ever having to replicate the car-centric infrastructure that has emerged in most western cities.


pages: 352 words: 104,411

Rush Hour: How 500 Million Commuters Survive the Daily Journey to Work by Iain Gately

Albert Einstein, Alvin Toffler, autonomous vehicles, Beeching cuts, blue-collar work, Boris Johnson, British Empire, business intelligence, business process, business process outsourcing, California high-speed rail, call centre, car-free, Cesare Marchetti: Marchetti’s constant, Clapham omnibus, cognitive dissonance, congestion charging, connected car, corporate raider, DARPA: Urban Challenge, Dean Kamen, decarbonisation, Deng Xiaoping, Detroit bankruptcy, don't be evil, driverless car, Elon Musk, extreme commuting, Ford Model T, General Motors Futurama, global pandemic, Google bus, Great Leap Forward, Henri Poincaré, high-speed rail, Hyperloop, Jeff Bezos, lateral thinking, Lewis Mumford, low skilled workers, Marchetti’s constant, planned obsolescence, postnationalism / post nation state, Ralph Waldo Emerson, remote working, safety bicycle, self-driving car, Silicon Valley, social distancing, SpaceShipOne, stakhanovite, Steve Jobs, Suez crisis 1956, telepresence, Tesla Model S, Traffic in Towns by Colin Buchanan, urban planning, éminence grise

The similarity in daily travel time between such radically different lifestyles inspired Cesare Marchetti, the Venetian theoretical physicist, to suggest that there was a ‘quintessential unity of travelling instincts around the world’ and that this unity resulted in a fixed ‘travel time budget’ that he named after himself as Marchetti’s Constant. He tested his theory against a variety of cultures past and present and decided that it has shaped our behaviour since the dawn of history. The territory associated with ancient Greek villages, for instance, whose inhabitants went about on foot, was about twenty square kilometres, which was about as much as they could manage within their travel time budget, and this pedestrian limit continued to restrict the size of towns and settlements until the Industrial Revolution.