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Why Autonomous Vehicles != Endless Sprawl

There’s been an ongoing debate in urbanist circles about whether autonomous vehicles (AVs) will damn us to perpetual sprawl and super commuting. I don’t believe that they will. In the first place, the business conditions under which AVs could conceivably induce more sprawl are unlikely. And in the second, there are numerous other factors that will affect the future of urban development in the US. That’s not to say we won’t double down on past mistakes, but it won’t be AVs that single handedly bring about that future on their own.  No One Wants To Sell You a Self Driving Car For AVs to even begin to induce more sprawl, they need to facilitate super commuting. For that to happen at any significant scale, they need to be ubiquitous and privately owned. And that is something I don’t think we’re going to see for one simple reason — it’s a product no one is selling. Ole Muskie notwithstanding, no one with capital to burn thinks selling private AVs is a winning strategy (with good reason). Given the accumulated R&D costs of the last several years, the price a firm would need to charge for the first generation of personal AVs would be astronomical. Moreover, a company selling personal AVs would give up on mountains of valuable data generated as the vehicle racked up mileage. Trip data feeds back in to improving the ability of AVs to navigate and data about consumer habits is valuable as well. We should also remember that the state of AV technology is still quite…meh. And in the absence of a step function improvement in the technology, the fastest way to get to market is to restrict the problem space. That means means a driverless TNC service that can be limited to trips in certain areas […]

The “Old People Need Cars” Argument- Myth or Fact?

The needs of the aged are often a political football in disputes over transportation policy.  On the one hand, defenders of low-cost parking and other car-oriented policies argue that older people all need cars because they can’t be bothered to walk.  On the other hand, smart growth types argue that we will all be too old to drive someday, so we need to end the reign of car dependency. One way of examining the issue is to find out whether seniors in fact drive more than everyone else.  Happily, the 2016 American Community Survey comes to our rescue here.  In Manhattan where I live, there are just over 129,000 senior-headed households with no car, and just over 36,000 with a vehicle available.  So contrary to car-lobby conventional wisdom, only about 22 percent of senior-headed households have a car.  How does that compare with other age groups?  On the one hand, only about 25,000 out of 200,000, or 12 percent, of millennial-headed households (that is, households headed by someone under 35) have a vehicle.  But among Manhattan households headed by persons between 35 and 64, about 28 percent (just over 109,000 out of just over 386,000)  have a vehicle- more than senior-headed households, to my surprise. So I rate the “Old People Need Cars” claim as Mostly False: most seniors here in Manhattan don’t have cars, even though they are more likely to own cars than millenials.  On the other hand, the latter fact suggests that seniors are rarely physically incapable of using cars.

Urban Mobility and Innovation with Anthony Ling at Stanford Graduate School of Business

I recently gave a talk on the topic of “Urban Mobility and Innovation” at the Stanford Graduate School of Business, where I am currently studying. I was positively surprised by the turnout for the event as there are currently few formal groups focusing on urban issues at the GSB. The reason I did this talk is because I have heard many people wanting to work in this field after graduation, despite not having a background in it. I believe that entrepreneurs and business leaders going into transportation, logistics and real estate markets markets could benefit significantly in their businesses by learning the fundamentals of urban development and planning. In this talk, I tried to explain how urban planning impacts new transportation technologies, as well as how new technologies are being adopted by city governments and regarded by urban planners worldwide. Some topics covered were: – How does urban planning limit or incentivize sustainable transportation? – Why are some cities walkable/bikeable and others not? – Why does mass transit fail in the US? – Solving traffic with tech: parking sensors and congestion pricing – Microtransit and low tech transportation: ideas from developing countries – The impact of autonomous vehicles and the Boring Company This event took place on Thursday, Jan 25, 2018 and was co-sponsored by the GSB Real Estate Club and the GSB Tech Club.

Mini review: Suburb, by Royce Hanson

Suburb: Planning Politics and the Public Interest is a scholarly book about planning politics in Montgomery County, a (mostly) affluent suburb of Washington, D.C.  The book contains chapters on redevelopment of inner ring, transit-friendly areas such as Friendship Heights and Silver Spring, but also discusses outer suburbs and the county’s agricultural areas. From my perspective, the most interesting section of the book was the chapter on Friendship Heights and Bethesda, two inner-ring areas near subway stops.  When landowners proposed to redevelop these areas, the planning staff actually downzoned them (p. 56)- and NIMBYs fought the planning board, arguing that even more downzoning was necessary to prevent unwelcome development. These downzoning decisions were based on the staff’s “transportation capacity analysis”- the idea that an area’s roads can only support X feet of additional development.  For example, Hanson writes that Friendship Heights “could support only 1.6 million square feet of additional development.” (p. 62).   Similarly, he writes that Bethesda’s “roads and transit could handle only 12 million square feet of new development at an acceptable level of service.” (p. 75) Thus, planning staff artificially limited development based on “level of service “(LOS) .  “Level of service” is a concept used to grade automobile traffic; where traffic is free-flowing the LOS is A.  But the idea that development is inappropriate in low-LOS places seems a bit inconsistent with my experience. Bethesda and Friendship Heights zip codes have about 5000-10,000 people per square mile; many places with far more density seem to function adequately.   For example, Kew Gardens Hills in central Queens has 27,000 people per square mile, relies on bus service, and yet seems to be a moderately popular area. Moreover, the use of LOS to cap density has a variety of other negative effects.  First, places with free-flowing traffic tend to be dangerous for […]

Liberty Machines™

During an urbanist twitter free-for-all last week, the thoroughly awesome term “liberty machines” was used to describe the virtues of the car. The claim was made that cars let individuals go wherever they want, whenever they want and are therefore a ‘freedom enhancing’ form of transit.  This isn’t the first time I’ve heard this argument in libertarian(ish) circles. But it doesn’t tally with my experience and I’m not sure it makes any sense even within its own premise. A Personal Anecdote and a Couple Thoughts When I learned to drive way back when, it was in the great state of Texas where driving is basically a necessity. In that context, getting my license (and being economically fortunate enough to have access to a car) was certainly liberating for me after a fashion. Thinking back, though, I enjoyed far less mobility as a car bound teenager in suburban Houston than I do now living in Oakland, California. I walk to the grocery, take BART to work, bike to the gym, catch a Lyft to go out, and/or drive myself when the occasion demands. Most of my trips are multimodal and the integration of transit modes affords me far more freedom of movement than car use alone ever could. The biggest reason for this is that single occupancy vehicle use doesn’t scale as a stand alone system. Unpriced roadways are prone to hitting congestion points and, as readers of this blog are probably aware, adding lanes doesn’t help. When roads become clogged, and there are no viable alternatives, a reliance on cars becomes a constraint. And to respond to the idea that mass transit relies on government subsidies and car use does not…the technical term for that would be factually incorrect. Mass transit is more than capable of paying for itself and let’s just say highways don’t […]

The Rent is Too High and the Commute is Too Long: We Need Market Urbanism

Why is the rent so damn high? And why does it take hours to commute from cheap, plentiful housing to modern economy jobs? If you are living in a big city in America, you likely face this problem. And it isn’t just an American problem: From Ireland to New Zealand to The Philippines, the rent/commuting crisis is hitting the 21st century hard, right in the big cities where most of the economic growth is coming from, and where most of the jobs are. Meanwhile, in the economically blighted regions of America, everything seems to be falling apart, with lead in the tap water, crumbling roads, and municipal bankruptcy for thousands of towns and cities a very real possibility. But it doesn’t have to be this way. There are a few cities that seem to have figured out how to match a futuristic tech economy with futuristic transit and housing for the masses. And there are many small towns around the world that don’t face insurmountable backlogs of infrastructure repairs. What are they doing different? Why is the price per square foot for living space in Tokyo a third of what it is in Boston or San Francisco?  Both cities have similar incomes and geographic constraints. Why is it an enormous scandal in Japan when trains leave a few seconds off schedule, while in America it is normal for your bus or train to be an hour late or never show up at all? Chalking this up to cultural differences is an easy explanation, and may have some weight, but I submit that the underlying laws of human economics do not vary based on culture, and there is much that we can learn from looking abroad. For Americans, the story begins in the nineteenth century when most of the country’s infrastructure […]

“Curb Rights” at 20: A Summary and Review

People sitting on a bus

At 4:30 am, alarms on my cellphone and tablet start beeping, just enough out of sync to prompt me to get up and turn them off. By 5:00 am, I riding as a passenger along an unusually sedate New Jersey Turnpike, making friendly conversation with my driver and survey partner to make sure he stays awake. At 5:30am, as most of the city sleeps, we find a drab concrete picnic table outside the bus depot and chow down on our cold, prepared breakfasts. Around us, buses are revving up and their drivers are chatting and smoking cigarettes. At 5:50 am, we find our bus and introduce ourselves to our driver for the day. All of the Alliance drivers seem to be Hispanic. Our run begins. You wouldn’t expect it, but the first run is always the sweetest. The riders trickle on, making it easy to approach them, and unlike the typical 8:00 am rush hour rider they are usually friendly and receptive to my request. I approach them and mechanically incant “Good morning Sir/Ma’am. Would you like to take a survey on your commute today for NJ Transit? It will only take a few minutes of your time.” My partner sits in the front, tallying the boardings, exits, and survey refusals. We will spend the next eight hours zigzagging across the New York City metropolitan area, asking harried riders about their commute. For the past month or so, this has been my part-time job: surveying bus riders about their origins, destinations, and travel preferences for NJ Transit. The job is just engaging enough that I rarely have time for sleeping or class readings, but has enough slow periods that my mind can wander on the question of bus planning. Although I am not authorized to read any of the surveys […]

Cities Should Not Design for Autonomous Vehicles

Coauthored with Emily Hamilton Last week, the autonomous vehicle company Waymo began testing cars in Chandler, AZ with no employees sitting in the front seat. While Waymo is busy creating systems of vehicle-mounted sensors that allow cars to safely navigate existing urban infrastructure and obstacles, some cities are pursuing plans to build “smart streets” that broadcast information about roads and potential hazards to autonomous vehicles. The American history of auto-centric infrastructure demonstrates that building specific infrastructure for autonomous vehicles may have long-lasting negative consequences. Waymo’s cars rely on both detailed maps and car-mounted lidar sensors that “see” the world around them in order to follow their route and to to avoid collisions. While the current technology is very safe, car-mounted sensors remain imperfect. As Tim Lee points out, there are reasons that Waymo launched in Chandler: its sunny weather, wide streets and minimal pedestrian traffic. Fully autonomous vehicles will need even better sensors than those that are currently available to drive safely in snowy conditions and in places with less regular streets that may confuse a vehicle’s sensors. Some analysts have advocated for publicly-provided smart streets and smart intersections that could limit the need for vehicle-mounted sensors and, perhaps, speed the adoption of autonomous vehicles. My colleague Brent Skorup has this view: Car-mounted sensors often confused by road materials (a shift from dirt to gravel or asphalt), reflective buildings, bridges, or even the weather. Roadside sensors not only mitigate these problems, but also reduce the computing load on car-mounted systems, because the vehicles have to make fewer snap decisions. There’s a way to get this information to vehicles quickly and accurately. Just as lawmakers and city planners started laying asphalt, installing streetlights, posting speed limits, and zoning property to accommodate Henry Ford’s cars, we need to design roads and infrastructure […]

How Suburban Parking Requirements Hold Back Downtown

A large, empty parking lot

You wake up thirty minutes before your alarm, jerking up after having a nightmare about a car crash. Reluctantly, you clean up, eat breakfast, and hop into your car. Work is only three mile away—easy biking distance—and there are 15 or so people in your neighborhood who work where you work—enough for a commuter bus make sense. But alas, the city required the developer to provide two parking spaces for your townhouse and the cost is hidden somewhere in your mortgage, so why not use it? After spending thirty minutes traveling three miles on the freeway—at least we live in the Golden Age of Podcasting, right?—you arrive at your suburban office park and pull into the garage. The parking is “free,” meaning that your pay has already been docked to cover the cost of the space, so why not use it? Your girlfriend calls shortly after lunch, asking if you want to go on a double dinner date with her friends to a new BBQ place downtown. You agree to join. You’re starving—you left lunch at home and it’s just too time consuming to drive to a decent place—so you hustle downtown. You arrive first, only to find out that there is only on-street parking. Downtown is, after all, exempt from parking requirements, and since street parking is “free,” it’s impossible to find a space during dinner time. You call your dinner partners—each of them is driving separately from work—and suggest another BBQ place downtown that offers subsidized garage parking. This place is a little more expensive, since the restaurateur has to cover some of the cost of offering parking, but you’re all hungry and don’t want to deal with the headache of cruising for street parking. Eventually you all meet and enjoy a nice meal, speculating about how traffic […]

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