Tag Archives: urban design

simple, 9-part safety instructions for crossing a Philadelphia street

131 pedestrians died in New York City in 2014, which is below the average of about 250 and the lowest recorded since 1910. However, the vision is zero. Here in Philadelphia we are not quite as advanced in our thinking, but when New York does something we will predictably try it 5-10 years later.

Mayor Bill de Blasio made Vision Zero a key policy priority for his first year. “Our top responsibility is protecting the health and safety of our people… From tougher enforcement to more safely-designed streets and stronger laws, we’ll confront this problem from every side,” remarked de Blasio upon the launch of his initiative last January.

I would put the majority of effort into safely-designed streets. I’ve been thinking recently about how I am going to teach my son to cross a Philadelphia street. It can’t just be “cross in the crosswalk when you have a walk signal” because that would mean certain death. No, it’s something like this:

  1. Using your eyes, try to locate where the crosswalk used to be before the paint wore off.
  2. If nobody is coming at you really fast, consider taking a step into the crosswalk just before the walk signal turns green, because the light for turning drivers will turn green at the same time, and turning drivers will gun their engines when they see that green light, or even a second or two before they think it is going to turn green (especially taxis).
  3. But before you take that first step, you better check for drivers who are going to gun their engines through the intersection just after their light turns red. Anyone can do this, but taxi drivers are especially bad. Don’t assume a police car or city bus won’t do it.
  4. Especially watch out for drivers in a left turn lane. They are going to gun their engines to make a quick left in a gap of traffic. They have a green light at the same time you have your walk signal. They are focusing all their attention on oncoming traffic and not on you. They will gun their engines on yellow and for several seconds after the light turns red, too.
  5. Watch out for drivers making fast right turns on green too, especially on wide streets with long, rounded corners.
  6. You know what, forget it. If you have a red “don’t walk” signal and nobody is coming, that is the safest time to cross because you know the turning cars also have a red light and have to stop – or realistically, at least slow down and look. But jaywalking in the middle of a block when nobody is coming is even safer. Just watch out for parked cars about to peel out.
  7. By the way, if a police officer is directing traffic, do not assume they will not direct that traffic to kill you. They will! They are directing traffic, not you.
  8. Always pay close attention to what drivers are doing. Always try to guess what they are going to do next, assume they are going to do something stupid or homicidal and have a sense of what you are going to do if they do that.
  9. But never let them know you’re paying attention. If they catch you paying attention, glare or make rude gestures, unless you suspect they are armed. Better yet, don’t be angry. Take a picture of the asshole and start a website called “I almost killed a pedestrian today and my license plate is…”

Never mind, I can’t explain this to a small child. I guess I just won’t let him walk on the street alone, ever. Come to think of it, I won’t let any of his grandparents or any friends visiting from the suburbs walk on the street alone either.

How can we accept a system that gives children a signal telling them to walk when it is not safe to walk??? It’s morally incomprehensible! We can design and build safe streets. But before we do that, we can start with simple, cheap fine tuning of the streets we have now. Turn off stop lights in favor of stop signs as much as possible. Where we think we have to have stop lights, allow absolutely no left turns on green, anywhere, ever – use turn arrows instead, with the pedestrian signal red when the turn arrow is green. Use curb extensions so right turns on green can be done only at a slow crawl. These simple things will help most drivers who are not actually homicidal maniacs, but just trying to get places on time or not accustomed to driving around pedestrians. For the remaining bad apples, get more police officers out there on foot and punish dangerous driving like the violent antisocial behavior it is. What, the police are too busy with other things? In New York City lately they have 250 pedestrian deaths a year and something like 300 murders, so they are in the same range as causes of violent death. I don’t have the stats on how many are children and the elderly in each category, but I am willing to bet those stats would fall more on the pedestrian side. So we need to think about what our priorities should be.

video camera coverage

The police are making increasing use of video cameras – and not just public ones, but cameras on private property pointed in a public direction. When they want private footage, they just ask and most people are happy to turn it over. Some stats on Philadelphia from Philly.com:

This year, police have released more than 500 videos in crimes ranging from Halloween-decoration theft to shootings, throughout all six detective divisions – Northeast, Northwest, East, Central, South and Southwest.

As a result of those videos, police have made more than 100 arrests and have solved more than 200 crimes, Stanford said.

Police have access to about 4,000 video cameras across the city – in addition to city-owned cameras, SEPTA and Amtrak cameras and those at Philadelphia International and Northeast airports, Stanford said.

That adds up to more than 30 cameras per square mile in the city, from which police can readily obtain video – so it’s pretty tough to commit a crime anywhere and flee without being caught on video at some point…

Video is recovered in about 50 to 60 percent of homicide cases, he said. Based on a five-year average of 297 homicides a year in the city, detectives are obtaining video in roughly 150 to 180 homicide cases per year.

As a city dweller, it’s kind of hard to have a problem with this. City streets, and even underground walkways, aren’t nearly as dangerous as suburbanites think they are from sitting home watching CSI. But still, the more people feel that violent crime is being deterred, the more they will want to be out, and the safer we will all be. You wouldn’t want the police using video footage to get overzealous about minor infractions like jaywalking or open containers, or against political expression, but at least in Philadelphia there are no signs of that happening.

November 2014 in Review

At the end of October, my Hope for the Future Index stood at -2.  I’ll give November posts a score from -3 to +3 based on how negative or positive they are.

Negative trends and predictions (-6):

  • There is mounting evidence that the world economy is slowing, financial corporations are still engaged in all sorts of dirty tricks, and overall investment may be dropping. Financial authorities are trying to respond through financial means, but the connections are not being made to the right kinds of investments in infrastructure, skills, and protection of natural capital that would set the stage for long-term sustainable growth in the future. (-2)
  • Public apathy over climate change in the U.S. may have been manufactured by a cynical, immoral corporate disinformation campaign over climate change taken right out of the tobacco companies’ playbook. It’s true that the tobacco companies ultimately were called to account, but not until millions of lives were lost. Will it be billions this time? (-2)
  • Glenn Beck has gone even further off his rocker, producing a video suggesting the U.N. is going to ration food and burn old people alive while playing vaguely middle eastern music. One negative point because some people out there might not laugh. (-1)
  • The new IPCC report predicts generally negative effects of climate change on crops and fisheries. The good news is it doesn’t seem to predict catastrophic collapse, but we need to remember that the food supply needs to grow substantially in the coming decades, not just hold steady, so any headwinds making that more difficult are potentially threatening. (-1)

Positive trends and predictions (+6):

  • A lot is known about how to grow healthy trees in the most urbanized environments. But only a few cities really take advantage of this readily available knowledge. (+0)
  • As manufacturing becomes increasingly high-tech, automation vs. employment is emerging as a big theme for the future. The balance may swing back and forth over time, but in the long term I think automation has to win. New wealth will be created, but the question is how broadly it will be shared. The question is not just an economic one – it depends on the kind of social and political systems people will live under in various places. This might be why the field of economics was originally called “political economy”. So I’m putting this in the positive column but giving it no points because the jury is out. (+0)
  • Google is working on nanobots that can swim around in your blood and give an early diagnosis of cancer and other diseases. (+1)
  • Economic slowing is probably the main reason why oil prices are way down. Increased supply capacity from the U.S. also probably plays a role, although there are dissenting voices how long that is going to last. I find it hard to say whether cheaper oil is good or bad. I tend to think it is just meaningless noise on the longer time scale, but you won’t hear me complain if it brings down the price of transportation and groceries for a year or two. (+0)
  • Millennials aren’t buying cars in large numbers. I don’t believe for a second that this means they are less materialistic than past generations, but I think a shift in consumption from cars to almost anything else is a net gain for sustainability. (+2)
  • I discovered the FRAGSTATS package for comprehensive spatial analysis of ecosystems and habitats. This gives us quantitative tools to design green webs that work well for both people and wildlife. Bringing land back into our economic framework in an explicit way might also help. (+1)
  • Perennial polyculture” gardens may be able to provide food year round on small urban footprints in temperate climates. (+1)
  • A vision for smart, sustainable infrastructure involves walkable communities, closing water and material loops, and using energy wisely. Pretty much the same points I made in my book, which I don’t actively promote on this site;) (+1)

Hope for the Future Index (end of October 2014): -2

change during November 2014: -6 + 6 = 0

Hope for the Future Index (end of November 2014): -2 + 0 = -2

Michael Graves’s linear cities

I had forgotten about this idea for long, linear cities laid out along transportation corridors.

It’s interesting. I’m a little skeptical for a few reasons. First, I can imagine it being a cold, corporate world. Who would own the buildings and transportation systems? From my little row house I can walk in many different directions and engage in many different activities on little parcels of land owned or controlled by many different entities. Would this linear city be more like living in a mall, where everything is ultimately controlled by one owner and sanitized for my protection? Also, a line is by definition a one-dimensional world – in a linear city it seems to me like I would have only two choices of direction and that sounds boring. Although the prospect of being close to a natural or agricultural landscape is intriguing. A final concern would be the capacity of the transportation system. As the city keeps getting longer indefinitely, it seems like you might come up against a finite transportation capacity and bottlenecks could develop in the system.

I’m also reminded about a couple works of science fiction, both of which are dystopian. Neal Stephenson’s Snow Crash is laid out along “linear cities” that are definitely not cold, corporate, sanitary or mall like (or safe). They are more like trashy interstate truck stops. Paul McAuley’s Invisible Country alludes to enormous “ribbon arcologies” where most people live. They don’t have to work because they have slaves, so apparently they spend most of their time tripping on drugs and virtual reality, and don’t really go out much. So the linear city is an interesting idea, but we need to be a little cautious how it unfolds.

10-foot lanes

Here’s an article arguing compellingly for 10-foot lanes on city streets. 12-foot lanes might save time and lives on highways, but on city streets they waste space and kill people.

On city streets, most drivers ignore posted speed limits, and instead drive the speed at which they feel safe. That speed is set by the cues provided by the environment. Are there other cars near me? Is an intersection approaching? Can I see around that corner? Are there trees and buildings near the road? Are there people walking or biking nearby? And: How wide is my lane?

All of these factors matter, and others, too. The simplest one to discuss, and probably the most impactful, is lane width. When lanes are built too wide, many bad things happen. In a sentence: pedestrians are forced to walk further across streets on which cars are moving too fast and bikes don’t fit.

I think we need to move toward safe, multi-modal streets on the Dutch and Danish models worldwide. This will be truly sustainable – safe, healthy, low-energy, low-carbon, and supportive of creative, innovative urban ecosystems where people can come together to solve problems. These are major capital investments with tax dollars, so a cost-effective way to do them is to develop the new standards, adopt them as business as usual, and then upgrade our streets to the new standards as they wear out.

That is a vision, but I see some cheap, easy short-term retrofits that could be done right away without major capital investment. Repainting with narrower lanes (streets need to be painted periodically anyway), and giving the saved space to pedestrians, bicycles, and green infrastructure would be pretty easy. Once streets get repainted, the next incremental step is bollards or other physical protections for pedestrians and cyclists. Some more short-term parking and loading zones would be helpful in a lot of cities – if we had more of those in Philadelphia you wouldn’t have so many people blocking the bike lanes we do have. Another short-term thing that could be done is to turn off stoplights and go back to stop signs on a lot of lower-traffic streets – this should even save a little energy and money. Stop signs are much safer for pedestrians, because all the vehicles have to stop or at least almost stop. You don’t have people gunning the engine on a yellow light to clear the intersection or make a quick turn – that is when pedestrians and cyclists die. Finally, on higher-traffic streets, light signals can be reprogrammed so that pedestrians are not in conflict with cars. Left turns on green just absolutely have to go away. I think right turns on green can be made a lot safer by  small curb extension requiring a sharper turn, but we should think seriously about whether we want any turns on green. Let’s think about the pedestrian scramble model, where all traffic stops and pedestrians can cross diagonally. Cyclists could be allowed to treat this like a stop sign. Then, add turn arrows for all turns and it’s pretty safe for everyone.

the sharing economy

In an IGM Forum poll of whether economists agree or strongly agree that services like Uber and Lyft are good for the economy, only 56% strongly agreed. The other 37% only agreed. (Some didn’t respond.) Meanwhile, the Guardian has printed an op-ed by one grumpy old man who hates the sharing economy:

Given vast youth unemployment, stagnating incomes, and skyrocketing property prices, today’s sharing economy functions as something of a magic wand. Those who already own something can survive by monetising their discomfort: for example, they can earn cash by occasionally renting out their apartments and staying with relatives instead. Those who own nothing, on the other hand, also get to occasionally enjoy a glimpse of the good life – built entirely on goods they do not own.

You don’t get it, grumpy old man. If the knowledge that you own an object sitting in your basement or garage gives you some feeling of pleasure or status, then more power to you and nobody should take that away from you. But for most people, I don’t think it does. The point is to get the same utility out of less stuff taking up less space. Cars are a particularly important example, because they take up such enormous amounts of space when most of them are just sitting there most of the time.

trees!

Here’s a long document from the “Trees and Design Action Group” in the UK about everything to do with planting trees in the city. Of particular use to me are some good references on dealing with underground utilities, species selection, and just lots and lots of great pictures. Even some nice stats on the odds of being killed by a tree compared to car accidents and cancer (the odds are very low, but not zero).  Trees really can be done a lot better than most American cities do them.

walkability matters – duh

For people still looking for an answer to the question “does walkability matter?”, here is some more solid evidence from Cities to add to the mountain.

In this study, researchers examined 170 neighborhoods in a medium-sized city to see whether walkability influences neighborhood sustainability. Until 2008, there had not been a reliable measure of the social, health, and economic impact of walkable neighborhoods. This dramatically changed when scholars were able to quantify walkability with tools such as Walkscore™; which measures how accessible daily living activities are by foot. The researchers investigated how walkability impacts the quality and sustainability of a neighborhood. They developed models that evaluated the correlation between an area’s Walkscore™ and four broad measures of urban sustainability: neighborhood housing valuation; foreclosures; and crime. Our analysis shows a positive impact not only on neighborhood housing valuation but also on neighborhood crime and foreclosure. These results provide policy opportunities for planners and citizen groups to pursue strategies to encourage the development of more walkable and sustainable neighborhoods.

I know I’m a broken record, but getting around under our own muscle power for most trips most of the time is the key to (in no particular order):

  • reducing carbon emissions
  • reducing air pollution from vehicle emissions, especially particulates which cause asthma and heart disease – this will add quality years to all our lives
  • solving drunk driving
  • saving lots and lots of money that we used to spend on cars
  • saving enormous amounts of space in cities that used to be used for car maneuvering and parking – space that can now be used for relaxing, recreating, habitat, housing, economic or commercial activity
  • creating space for people – yes, you can increase density and reduce crowding at the same time
  • increasing physical health through more physical activity, decreasing obesity, diabetes and heart disease, adding years to peoples’ lives
  • improving psychological health through physical activity
  • increasing social interaction
  • increasing business activity and profits
  • creating an ecosystem of innovative, creative people, businesses, nonprofit and government agencies