Cities mean traffic jams
Cities mean traffic jams.

Broadway,
Yes, you can have traffic jams without cities, but you cannot have cities without traffic jams.

1962
As illustrated in this throwaway piece from New York Times, that doesn’t stop politicians from decrying them and wishing they would go away:
Speaking of traffic-taming measures for Broadway around Times Square and Herald Square, Mayor Michael R. Bloomberg said on Thursday, “The traffic is so terrible and people are getting pushed out into the streets — the sidewalks can’t handle it.”
Traffic’s not a recent urban phenomenon:
This is news?
Joel H. Ross would not think so. His
The book, “What I Saw in New-York,” was published in 1851.
Nor was Mr. Ross alone. A hundred and fifty years ago, the newspapers were editorializing in a Whitman-esque fashion:

You’ll grow old waiting for
As early as the 1840’s, newspapers were bemoaning how crowded and noisy the streets were and how slow and tangled the traffic. In 1842 Walt Whitman wrote in an editorial, “What can
John Steele Gordon, The Scarlet Woman of Wall Street, page 35

Broadway traffic, 1860
Cities are dense, therefore they are vertical. Cities are vertical, therefore they are technological and capital-intensive (we saw this, among other places, in the Roman aqueducts and water infrastructure). There is always a balance between private spaces – homes, retail, offices, shops – and public spaces – parks, sidewalks, roads, and other ways.

Mumbai,
Among cities I’ve been to, the worst traffic jams – expect to spend two hours from door to door – were in Mumbai, and the most absurd are in Nairobi (where I was recently), because half the traffic from equatorial Africa flows through three roundabouts in Nairobi’s downtown, on its way from Mombasa on the Indian Ocean through to Kampala, Uganda and thence into Congo or Sudan or Zambia.

Mumbai: driving through a section of Dharavi at three miles an hour
Although this is pure speculation, I have a hunch that traffic is actually worst in cities that have just completed a rapid urbanization – like Mumbai and
Fifteen years later [1865 – Ed.], despairing that vehicles and pedestrians could ever safely mingle at Broadway’s busiest intersection at the time — Fulton Street in front of St. Paul’s Chapel — Alderman Charles E. Loew proposed an elaborate iron bridge over the thoroughfare.
“The ladies ascended in numbers and appeared to be delighted with the bridge and from the immunity it afforded them from the dangers of a passage across the street,” The New-York Times reported when the

The
Unfortunately, the bridge obscured the storefront of an important business, Knox the Hatter.

Bargains galore if you can reach my store!
Not for the last time, when commercial and public interests collided on Broadway, commerce prevailed. The
I think the boldfaced sentence is false causality, but in any case, the skybridge went the way of the dodo.

Where skybridges survive:
Since then, no real cure has been found for Broadway traffic, only palliation.
Throughout history, we find the rich and powerful complaining about traffic. In 1661, Sam Pepys groused in his diary about spending an hour and a half crossing

Capable young man in a hurry: Samuel Pepys
Sixteen hundred years earlier, as noted by Eric A. Morris of UCLA’s Institute for Transportation Studies, Julius Caesar banned all wheeled traffic in the daylight hours:

Friends, Romans, countrymen – lend me your cars
To end the scourge of traffic congestion, Julius Caesar banned most carts from the streets of
Unfortunately for those of us in a hurry, just as slums are economically rational, so too are traffic jams, in two ways:
1. Municipal budgeting. Private spaces are revenue producing, in demand, and readily created incrementally; public spaces are capital-consuming and to be done properly require a strong and courageous municipal government. For an example of massive failure of nerve, see how the mayor and city utterly botched the reinvention and reinhabitation of New New Orleans.
2. People’s earning power and choice. Give people secure tenure and a minimum acceptable structure (the embryo house) and they will improve it, bit by bit, incrementally. By contrast, they don’t spend money on public infrastructure, partly because they can’t (what they can afford goes into their private spaces first), partly because infrastructure involves network hookups and formalization – which some informal homeowners would prefer to defer. That’s why slums may be defined, in municipal terms, as places where private investment has outrun public infrastructure.
If there’s one image I have of peri-urban

Transportation and affordable housing are deeply interconnected.
“How long is your commute?”

There goes 25% of my budget, and 20% of my waking day.
Isn’t that always the question you ask a new acquaintance after discovering where he or she lives?
At some instinctive level, we all know that house prices and commute times are reverse-correlated: the price of a short commute is a high home price, and the cost of a low home price is a long commute.
Our lives normally shuttle between home and work as the twin poles of our daily existence, so we should have little surprise that our financial profile can be defined by these two poles, and the commuting bridge between them:
The need to commute cheaply also governs how we configure cities. Aside from affluent cities with good public transportation – think Manhattan and its subways/ buses – the most common approach to putting low-cost labor in walking proximity to low-wage jobs is the slum that abuts the high-rise condo, of which the best example I know is Paraisopolis in Sao Paulo.

Aerial view of Paraisopolis

Lapping at the shores of affluence: Paraisopolis

Looking into each other’s yards and balconies: Paraisopolis
One sees these slums in Sao Paulo, Cairo, Nairobi, Mumbai – everywhere there’s a booming city, not only are there traffic jams (mainly of affluent people stuck in their cars), there are also tides of humanity walking, bicycling, or auto-rickshaw-ing from place to place, bustling about doing the business of their lives.

Scooter and sidecar:
Back to Eric Morris:
If you live in a city, particularly a large one, you probably need little convincing that traffic congestion is frustrating and wasteful. According to the Texas Transportation Institute, the average American urban traveler lost 38 hours, nearly one full work week, to congestion in 2005. And congestion is getting worse, not better; urban travelers in 1982 were delayed only 14 hours that year.
Americans want action, but unfortunately there aren’t too many great ideas about what that action might be. As Anthony Downs’s excellent book Still Stuck in Traffic: Coping With Peak-Hour Traffic Congestion chronicles, most of the proposed solutions are too difficult to implement, won’t work, or both.
Fortunately, there is one remedy which is both doable and largely guaranteed to succeed. In the space of a year or two we could have you zipping along the 405 or the LIE at the height of rush hour at a comfortable 55 miles per hour.
There’s just one small problem with this silver bullet for congestion: many people seem to prefer the werewolf. Despite its merits, this policy, which is known as “congestion pricing,” “value pricing,” or “variable tolling,” is not an easy political sell.
It’s also regressive. Congestion pricing keeps the poor off the fast streets so the middle class and rich can get where they’re going more quickly. The poor, therefore, respond in the classical fashion – by packing more of themselves into any given space.

Out in the bush, pickup trucks serve as taxis
If you’ve been anywhere in Africa you’ve seen taxis, which are usually

Taxi rank,
Ultimately, there’s no free lunch; instead of paying with money, you pay with the effort and time needed to acquire the good. Think of Soviet shoppers spending their lives in endless queues to purchase artificially low-priced but exceedingly scarce goods. Then think of Americans who can fulfill nearly any consumerist fantasy quickly but at a monetary cost. Free but congested roads have left us shivering on the streets of
To consider it another way, delay is an externality imposed by drivers on their peers. By driving onto a busy road and contributing to congestion, drivers slow the speeds of others — but they never have to pay for it, at least not directly. In the end, of course, everybody pays, because as we impose congestion on others, others impose it on us. This degenerates into a game that nobody can win.

Crowding is intrinsic to lowering the costs
As Yogi Berra once aptly put it, “Nobody goes there no more, it’s too crowded,” and that is the stable state for cities – traffic jams are intrinsic, because there will always be somebody with a lower cost-per-minute than somebody else, so the equilibrium will be found at that point.

It gets late early there, too
Mayor Bloomberg, like the oft-cited King Canute, is trying to hold back the tide of humanity and commerce:
The latest attempt, a pilot program announced on Thursday by Mr. Bloomberg and Janette Sadik-Khan, commissioner of the Department of Transportation, would close Broadway to vehicular traffic from 47th to

Yeah, that’ll work
Effectively displacing the traffic jams to all the streets that border the pedestrian zone. That may be good if you want people to walk around

It’s always sunny and clean in CAD-CAM city
“Broadway’s character has evolved over the years, and that’s not what needs changing — it’s the traffic,” Ms. Sadik-Khan said on Sunday. “Instead of going against the grain of the city’s grid, Broadway will work with it.”
Time will tell. It could be that Broadway’s rural roots, three centuries old, render it too wild even for the Bloomberg administration to tame.
It has nothing to do with Broadway’s rural roots, and everything to do with the congestion inherent in cities.

Nary an angled street in sight
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