November 13th—Friday the 13th—marked the 13th day in a row that a pedestrian died on a New York City Street, all killed by cars or buses going too fast. They were among the 19 pedestrian deaths in the city last month—basically, one person lost for every business day. These fatalities occurred because despite all the progress New York has made since Mayor de Blasio and his DOT Commissioner Polly Trottenberg signed the Vision Zero Pledge in December 2013 (more on this below), most of our city streets are still seen primarily as transportation corridors for cars and trucks.
Until we prioritize pedestrian safety over traffic flow, we will never get to zero deaths for pedestrians, cyclists, drivers, or their passengers. But the good news is that when we do make streets that are safe for pedestrians, traffic still flows—and it becomes easy to design streets where people can want to get out of their cars and walk, enjoying public life. Which, after all, is what city life is all about. We don’t have to choose between pedestrian plazas in Times Square and suburban-style arterials. We can have our cake and eat it too.
A little history is relevant here: for decades, our city streets have been controlled by the DOT—the Department of Transportation— which employs traffic engineers and transportation planners who have traditionally seen their job as making traffic flow quickly and safely. They use a federal grading system that grades street quality according to the “Level of Service” (LOS)—a measurement of how well traffic moves.
Anything that impeded traffic flow was a problem to be identified and eliminated. Trees became known as Fixed Hazardous Objects (FHOs), because they damage cars that hit them. Standard practice in traffic engineering is therefore to confine trees to a Vegetative Containment Zone kept away from the vehicles.
People are called MHOs—Moving Hazardous Objects. They also slow down and damage cars that hit them, and so they’re kept away from the cars too.
WHEN I SHOWED A TRANSFORMATION FOR QUEENS BOULEVARD that included trees over the subway beneath the wide street, some people naturally had some doubts about how well the trees would grow. But look at these trees above the similar “cut and cover” subway at Broadway and 86th Street in Manhattan. “Cut and cover” is a construction process in which the street is dug up, the tracks are laid, and then the street is put back like a roof. I haven’t examined the drawings for either Queens Boulevard or Broadway, but the details should be similar.
Imagine how much better Broadway would look if the trees chosen had come from one of the great street tree species that form majestic canopies (they weren’t), or if the trees had been properly planted for healthy and mature growth (ditto). That means not only giving the roots enough room to spread out, but also planting trees like sycamores in conditions that allows their roots to intermingle, because we know now that many of the great street species share disease resistance through their roots. And today we have systems like Silva Cells for conditions where we know soil compaction and root spread can be a problem.
Now imagine how much worse Broadway would look without any trees…
Made in the shade at the corner of Broadway and West 86th Street, perfect for a hot August afternoon.
But a House of Lords report says it doesn’t work well enough.
WE GAVE Exhibition Road a mixed review in Street Design. I visited Exhibition Road a few times and found it over-designed, a frequent problem for 21st century streets. I agreed with our friend and colleague Hank Dittmar, whom we quoted on the subject of Exhibition Road: “Only the parked cars look comfortable.”
It’s in the news this week, because it may be the most famous Shared Space in Britain, at a time when “Shared Space” is the buzzword of the moment for High Streets (Main Streets) around the country. Most local politicians in the UK seem to know about Shared Space, and now the House of Lords has come out with a report that labels them “dangerous”—and in fact many UK Shared Spaces do seem dangerous, for at least two reasons: cars driving on them routinely go faster than is safe for spaces where pedestrians, cyclists, and cars are sharing the road; and they are frequently unsafe for the blind.
Vester Voldgade, Copenhagen. Looking north, across Ny Kongensgade.
VESTER VOLDGADE, KØBENHAVN (“West Rampart Street, Copenhagen”) is interesting both for its current condition and and its original state. It’s called “Voldgade” because like the boulevards of Paris, it was built where the old city wall stood (the French word “boulevard” comes from the word “bulwark”). As in Paris, allées were planted on the old ramparts, but in Copenhagen the result was different.
Parisian boulevards became tree-lined, symmetrical streets (planted in patterns composed of squares, the landscape architect Douglas Duany has pointed out). In an old photograph of a section of Vester Voldgade then called “Filosofgangen” (Philosopher Path), we can see that there was a street next to the tree-covered ramparts, with all the trees on the rampart side of the road in what looks like a naturalistic planting.
Filosofgangen (Vester Voldgade). Looking north in 1880.