Tag Archives: roads

Cities will need to adapt to self-driving cars

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If self-driving cars arrive soon, cities may not be ready:

Just six percent of long-range transportation plans in major US cities are factoring the impact of autonomous cars, according to a report released in the fall by the National League of Cities. That’s a bad sign. “Even though driverless cars may be shoehorned to fit the traditional urban environment in the short term, it won’t be a long-term solution for maximizing potential benefits,” says Lili Du, an assistant professor of transportation engineering at Illinois Tech.

The Driverless Cities Project is developing a comprehensive answer, folding in urban design, landscape architecture, transportation engineering, sociology, urban networks, and planning law. (The project is a finalist for the university’s $1 million Nayar Prize for research with meaningful social impacts.) The idea is to explore current research around the country, along with the more forward-thinking planning initiatives, and fold in their own studies to create a suite of guidelines—including model urban codes that determine so much about city environments—for municipalities to incorporate into their planning.

There’s plenty to consider. For example, we don’t know how parking will work for autonomous vehicles. Should cities be building lots outside urban centers? Is parking still necessary at all? Wireless vehicle-to-vehicle communication will lets cars pack together more tightly, which raises questions about how we fit them onto our streets.

Their autonomous operation alone can obviate the need for traffic signals and road signs. That’ll go a long way toward beautifying city streets, Marshall says, but brings up other problems regarding pedestrian safety, speed limits, roadway design, and the need for and sizes of driveways and curbs. Even further, vehicle ownership and usage patterns will change, once we’re able to summon an autonomous car through an app and then shoo it away once it delivers us at our destination. Who’s going to own and operate those cars, and what will they do when not serving their owners? Park in the ‘burbs? Infinite-Uber-loop?

It sounds like there is a lot of good that could be done in helping to reverse the changes that occurred from the early to mid-1900s where cities were altered in significant ways – wider streets and smaller sidewalks, the construction of highways – to make it easier for cars to operate in the city. Of course, making some of these roadway changes doesn’t necessarily lead to a Jane Jacobs urban paradise. Take downtown Manhattan: you could reduce the size of roads and give pedestrians more space. Yet, the scale of the buildings often would not help; you can create all sorts of sidewalks but if they are shrouded in shadows from skyscrapers, is it inviting? Or, adding more pedestrian space may not necessarily lead to more lively street life if there isn’t a mix of uses to attract people. On the whole, having to emphasize cars less could be very attractive but a lot of additional work would need to be done to truly take advantage of the opportunity.

Self-driving cars require better maintained roads

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Self-driving cars may have advantages but they might also require spending more on road upkeep:

Shoddy infrastructure has become a roadblock to the development of self-driving cars, vexing engineers and adding time and cost. Poor markings and uneven signage on the 3 million miles of paved roads in the United States are forcing automakers to develop more sophisticated sensors and maps to compensate, industry executives say.

Tesla CEO Elon Musk recently called the mundane issue of faded lane markings “crazy,” complaining they confused his semi-autonomous cars…

An estimated 65 percent of U.S. roads are in poor condition, according to the U.S. Department of Transportation, with the transportation infrastructure system rated 12th in the World Economic Forum’s 2014-2015 global competitiveness report...

To make up for roadway aberrations, carmakers and their suppliers are incorporating multiple sensors, maps and data into their cars, all of which adds cost.

 

It would be interesting to see some estimates of the additional costs to keep roads at a level where self-driving cars can safely operate. Does the money saved in less congestion on the roads and fewer traffic accidents outweigh the new maintenance costs?

On the other hand, having to do more frequent construction may not affect drivers as much if all cars are self-driving. Since such vehicles are supposed to improve traffic flow, construction is something drivers wouldn’t have to handle – their cars would do it for them. And, if we have driverless cars, can we have driverless maintenance vehicles?

Hoping to retire the myth of widening roads to reduce traffic

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Eric Jaffe provides a reminder that traffic is not lessened if there were just wider roads:

“Wider Roads = Less Traffic”—The most enduring popular traffic myth holds that building more roads always leads to less congestion. This belief is a perfectly logical one: if there are 100 cars packed into one highway lane, then building a second should mean there’s 50 cars in each. The problem, as transportation researchers have found again and again, is that when this new lane gets added the number of cars doesn’t stay the same. On the contrary, people who stopped driving out of frustration with traffic now attack the road with an enthusiasm unknown to mankind.

While residents of heavily congested metro areas have a suite of four-letter words to describe this effect, experts call it “induced demand.” What this means, simply put, is that building more road eventually (if not always immediately) leads to more traffic, not less. Fortunately, local leaders are starting to distinguish reality from myth when it comes to induced demand. Unfortunately, the best way to address it—congestion pricing—remains all-but politically impossible in the U.S. That pretty much leaves one thing to do: deal with it.

A congestion tax is one way to deal with the issue: make people think twice about driving into heavily trafficked areas. At the same time, broader solutions could be employed: planning communities and regions that don’t rely so much on solo driver trips (such as through denser development); increasing funding to mass transit and providing more regular service and/or more options; and finding other ways to cut incentives on driving such as increasing gasoline taxes or paying per mile for driving. Of course, these broader approaches may be asking too much as Americans still like the option of driving. But, it may take some bold politicians and municipalities to try congestion pricing and show that it can work before it is widely adopted.

In other words, you may be able to show studies that demonstrate how this myth isn’t true but perhaps Americans dislike the truth – and the solutions that go with – even more.

The massive traffic generated by an Amazon fulfillment center

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Labor practices in Amazon’s warehouses may be one issue but another issue for nearby residents is the traffic around the facilities:

Traffic grinds to a halt for miles when the fulfillment center’s more than 4,000 employees are going in and out of the facility during rush hour.

Robbinsville Mayor Dave Fried is threatening to sue  Amazon over the traffic that’s clogged area roads after a senior official failed to show at a meeting to discuss the problem…

The company’s fulfillment center, called the “busiest warehouse on the planet” is located on New Canton Way in the township…

In a statement on the township website Fried says:  “Children cannot get to school, residents cannot pull out of their driveways, and this has become a very serious public safety issue.  According to police department crash data, there have been 25 accidents that can be attributed to workers coming to and from the Amazon warehouse over the past six weeks, compared to just one accident over the previous six weeks.”

A common NIMBY concern about new developments is the traffic generated. Nearby residents complain about the traffic associated with schools, churches, shopping centers…basically, any sort of new development, particularly in more residential areas. Sometimes, these concerns seem like a stretch: a smaller church is really going to disturb local streets all week long? Yet, traffic can truly be an issue for an area is the roads can’t handle all the new volume. This Amazon facility in New Jersey is a good example: all the sudden, thousands of vehicles are now flooding local roads at relatively short periods. This is why the staggered start and stop times might be a good solution; roads are often constructed to handle rush hour type flows but they typically only happen twice a day and the roads sit emptier for much of the rest of the day. (Carpooling might be another good suggestion – how many Amazon workers drive solo? – but getting Americans to do this consistently is quite difficult.)

This is also a good reminder of the physical world footprint of an online company like Amazon. The products may come through the mail but all the infrastructure happens somewhere and affects various communities.

Drivers pay less than what the roads cost

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One report suggests the gap between what drivers pay and what roads cost continues to grow:

A report published earlier this year confirms, in tremendous detail, a very basic fact of transportation that’s widely disbelieved: Drivers don’t come close to paying for the costs of the roads they use. Published jointly by the Frontier Group and the U.S. PIRG Education Fund, “Who Pays for Roads?” exposes the myth that drivers are covering what they’re using.

The report documents that the amount that road users pay through gas taxes now accounts for less than half of what’s spent to maintain and expand the road system. The resulting shortfall is made up from other sources of tax revenue at the state and local levels, generated by drivers and non-drivers alike. This subsidizing of car ownership costs the typical household about $1,100 per year—over and above the costs of gas taxes, tolls, and other user fees…

There are good reasons to believe that the methodology of “Who Pays for Roads?” if anything considerably understates the subsidies to private vehicle operation. It doesn’t examine the hidden subsidies associated with the free public provision of on-street parking, or the costs imposed by nearly universal off-street parking requirements, which drive up the price of commercial and residential development. It also ignores the indirect costs that come to auto and non-auto users alike from the increased travel times and travel distances that result from subsidized auto-oriented sprawl. And it also doesn’t look at how the subsidies for new capacity in some places undermine the viability of older communities…

The problem with the subsidies currently propping up driving is that they’re often hidden: If they were made more explicit, policymakers would likely rearrange their priorities. The problem of pricing roads correctly is one that will grow in importance in the years ahead. It’s now widely understood that improvements in vehicle fuel efficiency and the advent of electric vehicles is eroding the already inadequate contribution of the gas tax to covering road costs. The business model of companies such as Uber and Lyft likewise hinges on paying much less for the use of the road system than it costs to operate. The problem is likely to be even larger if autonomous self-driving vehicles ever become widespread—in larger cities it may be much more economical for them to simply cruise “free” public streets than to stop and have to pay for parking. The root of many existing transportation problems—and the problems to come—is that the prices are all wrong.

Americans like their cars and policies have reflected that for decades. But, owning the “average” car is not cheap – there are a number of expenses that many drivers would say consume a decent amount of their budget. The real issue may not be increasing the gas tax – and with gas as cheap as it is right now, this would be as good a time as any to fix that – or limiting subsidies. The real goal may need to involve having less need for cars and roads. Having electric cars might help society in some ways but it doesn’t solve the problem of paying for roads (see the pilot programs for a per-mile driven tax). Electric cars may enable sprawl to go on for decades.

In the end, perhaps we need to figure out to build and maintain roads more cheaply…or we are left with two options I imagine a lot of people (not necessarily the same ones) will dislike: getting cars off the road or upping the cost of driving by quite a bit.

Mexico City’s pedestrian superhero back in the news

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Continuing to fight for pedestrians in Mexico City is “The Little Pedestrian”:

The mighty Peatonito (Little Pedestrian) pushes cars blocking the path of pedestrians, creates crosswalks with spray paint, and climbs on vehicles parked on sidewalks — though his mother has begged him to stop stepping on them.

“Pedestrians are happy because they finally have a defender,” Peatonito said, his face covered by a wrestling mask adorned with a pedestrian symbol and wearing a striped cape (sewn by his grandma) adorned with the black and white stripes of a pedestrian crossing.

“We live in a car dictatorship. Nobody had fought for pedestrian rights until some activists emerged a few years ago.”

Meanwhile, below the city streets five clowns are on a similar mission to send up urban incivility, barging into a metro carriage making monkey noises and holding a sign saying “It’s better without pushing.”…

Peatonito aims to reduce traffic deaths in a city where pedestrians account for more than half of around 1,000 annual road fatalities, according to health ministry statistics.

This is a fascinating way to draw attention to the issue. It is one thing to publish statistics or to have more road signs (read about the campaign in Illinois to post the number of driving deaths for all to see) but another for a handful of people to act in public spaces. With the line of “we live in a car dictatorship,” I’m surprised others haven’t taken up similar routines in other cities around the world (including the United States which might be as much as a car dictatorship as one can have). But, two things might be problematic:

1. I wonder if police or local officials could actually arrest them for being a disturbance. In a real car dictatorship, you don’t want fake superheros running around in the way of cars. Might it take some complaints from drivers or others who feel that these crusaders have gone too far?

2. How does one translate these activities into a broader social movement or changes in policies and regulations? If the pedestrians of Mexico City wanted to take over the roads, they certainly could. At the least, this superhero might publicly shame the city but that doesn’t necessarily lead to large-scale change.

By the way, this isn’t the first time Peatonito has drawn international news coverage. See this story from 2013 that discusses what his actions led to:

Peatónito is the alter ego of Jorge Cáñez, a 26-year-old political scientist in Mexico City who has also worked with the Institute for Transportation and Development Policy (ITDP)…

His efforts got him invited to speak at the Walk 21 conference in 2012 and has met with officials from Mexico City’s department of public security to discuss the importance of putting pedestrians first in street design and traffic enforcement. He is hopeful about government efforts to improve infrastructure. At least, he says, they are now talking about giving pedestrians priority — which would only make sense in a city where 80 percent of the population doesn’t drive…

“Once the government has adopted the ‘pedestrian is the king’ in their speeches, I’m going to monitor and help them till the day there’s no pedestrian fatalities nor accidents, and also decent sidewalks and safety crossings in the streets. But even if the government calls me to collaborate, I will always be a non-partisan citizen hero of the public domain.” He has registered Peatónito as Creative Commons, so that anyone who wants can become Peatónito.

Perhaps there really are superheros…

Road damage costs $515 per car per year

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Urban roads that aren’t in peak condition cost individual drivers an average of $515 a year:

The numbers from TRIP show that 28 percent of the nation’s major roadways — interstates, freeways, and major arterial roadways in urban areas — are in “poor” condition. This means they have so many major ruts, cracks and potholes that they can’t simply be resurfaced — they need to be completely rebuilt.

Those cracks and potholes put a lot of extra wear and tear on your car. They wear your tires away faster, and they decrease your gas mileage too. All of these factors go into that calculation of $515 in extra annual cost, above and beyond what you’d pay to maintain your car if the roads were in good conditions…

The worst roads in America are in Washington D.C., where 92 percent of our major roadways are rated as “poor.” Conversely, zero percent of D.C.’s roads received a “good” rating in the Federal Highway Administration data analyzed by TRIP.  There is almost literally not a single good road in D.C.

But D.C. is a special case, since it is not a state and doesn’t have vast stretches of highway like most places in the U.S. do. So among the real states, the worst roads are in California where 51 percent of the highways are rated poor. Rhode Island, New Jersey and Michigan all have “poor” ratings of 40 percent or more. Dang.

The ending of this analysis is that we need to spend more on infrastructure. It may cost a lot to pay upfront costs to completely rebuild major roads (plus the time lost to congestion) but it may just pay off down the road with reduced costs for drivers. Such is the nature of infrastructure: well-spent money early on can save money and time later on. And, of course, there are better and worse ways to fight potholes.

But, there may be a second moral at the end of this story. Cars are expensive. You drive them off the lot and they depreciate. Gas prices are up and states are raising gas taxes. Insurance isn’t cheap and it is required. Maintenance can be pricey. New features – such as automation or backup cameras or alternatives to gas power – may just cost more. And to top it all off, many American settings practically require a car. (Indeed, this is a contributor to the spatial mismatch for jobs.) The whole system devoted to driving from cars to roads to garages requires a lot of resources that might have been spent elsewhere.

AP gives five solutions to nation’s growing traffic problems

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The Associated Press discusses five ways to reduce traffic in America. Here are the quick summaries of each:

PUBLIC TRANSIT RENAISSANCE…

TOLLS ARE ‘HOT’…

DUMB CARS, MEET SMART CARS…

SELF-DRIVING CARS…

IN TECHNOLOGY WE TRUST

Perhaps we will have a situation where each of these options will be tried out in different places. For example, some cities will pursue mass transit – which can be quite expensive in already expensive areas – while others will simply add tolls to existing highways.

But, if I had to guess which options will prevail, I would guess numbers three through five which do not require people to give up their cars or the distance they commute to work and other places. (Some will voluntarily go for denser housing in more urbanized areas but others will interpret this as the government trying to force people out of suburban or rural living.) The first two require a lot of political will, either to spend the money for mass transit or to get people to pay new money for things they didn’t pay for before. Of course, the new technology won’t come cheap – it will be built into car costs in the future – but still appears to give the individual owners more options. Plus, American society tends to have quite a bit of faith in science and progress to solve problems.

Midwest has the world’s straighest roads

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One man set out to find the world’s straightest roads and he found them in the Midwest of the United States:

McCann writes:

“Using OpenStreetMap (OSM) data, I was able to see how bendy or straight the roads are all over the world. One theory I had was that Europe, where current roads are based on older roads that predate cars, would have more bends and curves than the USA, where current roads were (in many places) only put in in the last 150 ? 100 years, and probably put in directly and dead straight.

“The Mid-west USA and Canadian prairies have the most straight roads. Nearly all of the roads there are straight. This broadly matches my theory.”

For anyone questioning McCann’s methods, rest assured he used an actual “bendyness ratio” defined as the “length of the road divided by the straight line difference between [its] end points.” He didn’t think to abbreviate this ratio with a mathematical symbol, but I would suggest ||/?.

The project, which McCann launched some time ago but is now featured at Maps Mania, has its shortcomings. One is potentially incomplete road data in OpenStreetMap, another a technical issue with split “ways” that McCann delves into on his site. Still, it appears to paint an accurate picture of the Midwest, land of unbending, endless-feeling roads (red-orange areas mark hotbeds of straightness):

A lot of this is due to the fact that it is possible to have straight roads on flat land. Yet, these straight roads may be helpful in other ways. Back in graduate school, I wrote a paper about cognition in cities and some have argued that having a grid system – often aided by having flat land (see San Francisco for an interesting application of a grid on numerous hills) – is helpful for navigation (it is easy to tell directions) and better for traffic (multiple options in a grid rather than having some roads that are used more heavily). Think the Manhattan grid. Having this grid may even allow city dwellers to use the landscape as extended cognition where they don’t have to cram so much into their brains because they can offload information onto the grid. In contrast, I was recently in the western Philadelphia suburbs where the roads tend to follow the topography. It took me a number of visits before I knew which roads went where as they tend to twist and turn in ways that make sense. Of course, the Midwest roads may not be as scenic as those dipping and turning around hills, forests, water features and other natural phenomena. Some of the early wealthy suburbs like Riverside, Illinois intentionally had such curved roads on the flat landscape in order to highlight the landscape. Such curved roads in neighborhoods can also slow down drivers who have to be a bit more wary.

Where are the ubiquitous Chicago pothole stories?

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As we emerge from winter, I thought today that I haven’t seen many pothole stories in the Chicago media. These are typically a staple of news coverage – see examples here and here. Here are some reasons why there may not have been so many stories this year:

1. The communities in the Chicago region did such a fine job filling potholes in recent years that the problem wasn’t so bad this year. This could be true; there are ways to address potholes that solve the problems for the longer term. Yet, the problems were acute in recent years and it sounded like municipalities were trying to fix things as quickly as possible plus there were added costs with salt supplies.

2. Other concerns have dominated the news. Perhaps it was the cold weather and snow cover. Perhaps the transportation news was dominated by future construction on areas like the Jane Byrne Interchange, I-90, and the proposed Illiana Expressway.

3. The weather has been so cold that potholes haven’t really formed yet since the roads were not thawing and freezing. Perhaps the potholes will really start emerging this week.

4. Perhaps I missed all the pothole stories?