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.
The Boulevard St. Germain on the Left Bank of Paris in 2011. One of the fabled streets of Bohemian Paris, today it is a street that many pedestrians flee.
“All the great cities and towns are congested” is an urbanist trope that needs to be retired. It comes, I believe, from arguing against traffic engineers when they talk about Level of Service rather than observing the best places.
I was in London the day their Congestion Zone started. I was staying in a hotel on High Holborn, a major through street that continues Oxford Street (or vice versa, depending on where you’re coming from). The Central Line on the London Underground was undergoing repairs and wasn’t operating.
The day before the congestion zone started, Oxford Street and High Holborn were jammed even more than usual with buses, taxis, trucks, and cars. You could walk any distance long or short in either direction from Oxford Circus or Tottenham Court Road and know that walking would be faster than taking a bus. They were traveling along stuck nose to tail in traffic. The problem was the speed the buses were going, not time spent waiting for a bus.
That day traffic flowed like water in an oversized pipe. It was so pleasant, and such a pleasant contrast to the day before. It was the way cities should be. You could walk without being buffeted by noise and diesel smell, and you didn’t have to wait at every crossing for traffic to pass by.
The High Street in Marlborough, a country market town in Wiltshire, England. In the last 10 years, many British roads have been overwhelmed by an enormous increase in traffic.