Streetsblog Capitol Hill

Nearly every time a new road is built, traffic volume increases beyond the predictions of the traffic studies. And nearly every time, transportation planners are surprised.

The explanation is a wonky little phenomenon called “induced demand.” Essentially, if you widen roads to reduce congestion, people who were avoiding the road because of congestion will find it more convenient and take more trips, thus increasing traffic again.

So what do you have then? A big expensive project to eliminate traffic, and more traffic.

Induced demand has been widely studied; it was acknowledged by the American Association of State Highway and Transportation Officials in 1957. Today it is widely accepted by transportation practitioners. The Clean Air Act even requires big cities to account for this effect in traffic modeling.

But many large metropolitan planning agencies refuse to comply, according to Todd Litman of the Victoria Transport Policy Institute [PDF], and smaller cities are under no obligation to do so. Futhermore, though they may account for certain types of induced demand — extra trips — they don’t account for some of the long-term impacts of highway investments, namely sprawl.

That alone is enough to undercount the impact of induced demand. According to a 2005 study [PDF] set in California, “the net benefits of a suburban highway capacity expansion project declined by 50 percent if the project caused 60,000 residents (about 2 percent of the regional population) to move from urban to suburban locations, thereby increasing traffic congestion on that roadway link.”

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Tens of thousands of people from nearly every nation on earth have descended on Copenhagen this month for the UN climate summit. As the delegates try to piece together a framework for reducing greenhouse gas emissions, they're also absorbing lessons from one of the world's leading cities in sustainable transportation. In Copenhagen, fully 37 percent of commute trips are made by bike, and mode share among city residents alone is even higher.

Copenhagen wasn't always such a bicycling haven. It took many years of investment in bike infrastructure to reclaim streets from more polluting, less sustainable modes. Last week, I was able to squeeze in a whirlwind tour with Mikael Colville-Andersen, the bike culture evangelist behind Copenhagenize and Copenhagen Cycle Chic, to get a taste of the city's impressive bike network and cycling amenities. Watch this video and see how Copenhageners flock to the streets by bike even in December, when average temperatures hover just above freezing.

If you've been following bicycle blogs for any amount of time at all, you've probably stumbled upon Mikael Colville-Andersen, who runs the blogs Copenhagenize and Copenhagen Cycle Chic. (We often feature his posts on the Streetsblog Network.) On Tuesday afternoon, he brought his inimitable style of bike advocacy (pretty spiffy, though low-key) to Columbia University in New York.

The title of his talk was "Marketing Bicycle Culture to Subconscious Environmentalists." Basically, Colville-Andersen's message came down to this: We need to promote bicycles as the incredibly practical, fun, stylish, sexy and healthy items that they are. We also need to present them as being mainstream, not the province of a subculture (whether it be Lycra-wearing or fixie-riding).

In Copenhagen, bicycling is mainstream -- 37 percent of commuters in the city use bikes, and 55 percent of trips overall are made on bikes. As Colville-Andersen pointed out, people on bikes in the Danish capital are not "cyclists" -- they're people. On bikes.

How did this state of affairs come about? According to Colville-Andersen, in the 1960s Danish cycle culture was "dying," as it was all over the world in the post-World War II era. Then, because of what he described as a combination of visionary urban planning and visionary political decision-making, the city embarked on a long-term program of creating consistent bicycle infrastructure that would make everyone feel safe on their bicycles.

And now, everyone does. Colville-Andersen said that people in his home city laugh at him when he says he's going abroad to lecture on Copenhagen's bicycle culture -- because to them it has become invisible. A bicycle is simply a tool, like a vacuum cleaner. Most Copenhagenites surveyed say they choose to travel by bike because it is simply the easiest, fastest way to get from Point A to Point B.

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It's a good day in a city's urbanist evolution when Jan Gehl comes to town, and now San Francisco can add itself to the growing list of cities around the world that have embraced his people-first approach to urban design and planning.

Hoping to keep pace with the progress in New York City over the past two years, the San Francisco Planning Department has commissioned Gehl Architects to transform several prominent streets and public spaces in the city, starting with one of the busiest tourist attractions in the U.S., Fisherman's Wharf. 

On Tuesday night, in front of a standing-room audience of special guests at Pier One's Bayside Room, Gehl presented his general vision for improving San Francisco's public realm. The event, sponsored by Mayor Gavin Newsom, San Francisco Planning and Urban Research (SPUR), the San Francisco Bicycle Coalition, Livable City, and Walk SF, was the first in the new Great Streets Campaign Speakers Series, which will bring some of the world's most remarkable urban visionaries to the Bay Area in the coming months to share their successes and offer San Francisco models for instituting its own vision for a sustainable and healthy city. 

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Why have Danes again been named the happiest people on the planet? Early this year ABC News cited bikes as "perhaps ... the best symbol of Danish happiness," and in this clip from "Contested Streets" it isn't hard to see why. Here, livable streets guru Jan Gehl and others explain the many ways an increase in bike traffic (now one-third of all commutes) has improved life in the capital city of Copenhagen.

But it didn't happen overnight. Rather, it took four decades of gradual change to make Copenhagen the place it is today. As for replicating that success elsewhere, says Gehl: "if you don't have enough nice spaces, you can see these [become] overcrowded spaces. Then you should just make more spaces."

The Jan Gehl product roll-out continues apace. Last week, WNYC. This week, New York Magazine. Word has it Gehl's team will be presenting Department of Transportation brass with some pretty big ideas for street space re-allocation. In the meantime, enjoy another interview with everyone's favorite Danish urban designer:

Can New York really be tamed?
I don’t have any vision of taming New York, and I don’t think it should be. I do think there’s an imbalance between the various uses of the street that can be adjusted.

You still bike daily. Do you bike when you’re here?
Once it’s reasonably safe, you can ask the senior citizens to bike. I shall be happy to be the first. My younger colleagues bike a lot here to find out how it is. It’s a matter of age and daring, and a few other things.

Like being crazy?
That’s your words.

Is London’s congestion-pricing plan working?
Traffic has dropped there by 18 percent. And when London was given the 2012 Olympics, suddenly everybody was eager to improve the city very fast. If you can only get an Olympics, everything will be fine.

How can we reduce traffic in midtown?
There’s a number of ways, but congestion pricing may be the easiest and most-proven means of doing it quickly.

So you think it’s necessary?
Did I say that? I didn’t say that.

With all the bike theft here, could a Copenhagen- or Paris-style bike-sharing system work?
I certainly think so. These bikes would look different and be geared so that they’d be a little bit awkward to bike long distances on. At first in Copenhagen people collected them, but after a few years, that was not so interesting anymore.

What do you think of the new bike lane on Ninth Avenue?
It’s grossly overdone. You can make the whole thing one third the width.

Have you told the city this?
Not yet. I will next week.

Streetfilms' Clarence Eckerson was at Town Hall on Saturday night for the New Yorker Festival's "How New Yorkers Ride Bikes," hosted by former Talking Heads frontman David Byrne. Clarence wasn't allowed to film the event so he published a nice write-up on StreetFilms. Some excerpts:

Mr. Byrne, dressed in black and sporting his cool taxi-yellow bike helmet (see our previous StreetFilm here) then rode onto the stage and locked up. Moments later Hal Ruzal, NYC bicycling icon and mechanic at Bicycle Habitat, emerged from behind a curtain to pick his lock with a variety of tools. Mr. Ruzal's advice on not getting your bike stolen? "Have a bicycle lock that is real expensive, and a bicycle that's really cheap."

Danish urban designer Jan Gehl extolled the many benefits of biking in Copenhagen, where 38% of commuters ride: "This is important because if you see a pretty girl, you can easily jump off the bike and start kissing."

Mr. Byrne then introduced Jonathan Wood, the hilariously dry Deputy Chairman of the U.K.'s Warrington Cycle Campaign, who burned down the house with his "Bicycle Facility of the Month" slide show.

Here is a "Facility of the Month" example from the Warrington web site:

Keeping cycle lanes clear of parked cars is a problem the world over. This design from Mulhouse in France provides a self enforcing solution; yellow bollards have proved to be much more effective than yellow lines at deterring illegal parking.

The Department of Transportation revealed plans for New York City's first-ever physically-separated bike lane, or "cycle track," at a Manhattan Community Board 4 meeting last night. The new bike path will run southbound on Ninth Avenue from W. 23rd to W. 16th Street in Manhattan. Unlike the typical Class II on-street bike lane in which cyclists mix with motor vehicle traffic, this new design will create an exclusive path for bicycles between the sidewalk and parked cars.

DOT's plan also includes traffic signals for bicyclists, greenery-filled refuge areas for pedestrians, a new curbside parking plan, and signalized left-turn lanes for motor vehicles. "The left turn lane will be immediately adjacent to the bike lane," DOT Bicycle Program Director Josh Benson explained to CB4 members. "As a cyclist you’ll know that if there’s a car next to you, that car is turning left." Likewise, left-turning drivers' view of cyclists will be completely unobscured. The bike lane is 10-feet wide to accommodate street cleaning and emergency vehicles.

DOT planners consulted with Danish urban designer Jan Gehl on the plan, according to Transportation Alternatives Deputy Director Noah Budnick. "They are drawing from international best-practice and being smart about talking to other engineers and planners who have implemented these types of designs," Budnick said. "They really thought holistically about everything that is going on on the street."

These types of physically-separated on-street bike lanes, increasingly referred to as "cycle tracks," are commonly found in bike-friendly cities like Copenhagen and Amsterdam. Livable Streets advocates have long pushed DOT to experiment with this type of bike lane design in New York City. After Benson's presentation, Community Board 4's transportation committee voted to approve the DOT plan which is part of a larger pedestrian safety and public space initiative around the intersection of 9th Avenue and 14th Street.

The new bike lane design is a break from previously stated DOT policy. In March, during discussion of a possible Houston Street bike lane, DOT officials told Manhattan's Community 2 that physically-separated bike lanes should only be installed on streets with a maximum of 8 intersections per mile to ensure fewer conflicts with turning vehicles.

A copy of the presentation DOT made at last night's Community Board meeting can be found here.

The Urbanist Musketeers: Alex Garvin, Jan Gehl and Fred Kent in Copenhagen, Denmark, Sept. 30, 2006.

Jan Gehl, the famed Danish urbanist, is in New York City this week where, sources say, he has been hired as a consultant for Mayor Bloomberg's PlaNYC program.

At a presentation to the board of the Regional Plan Association on Wednesday at the offices of PriceWaterhouseCoopers at 41st and Madison, Gehl said the city must tame the automobile if it is going to become a truly great city for pedestrians and for public life.

Asked during questions what he would do specifically for the city, Gehl said he would make pedestrians more comfortable in the city by adding street furniture, widening sidewalks and creating "oasises" for them. In addition, he would put immediate emphasis on better conditions for cyclists. And finally, he said attention should be paid to the mass transit system. Good mass transit and good pedestrian environments, he said, "are brothers and sisters," each depending on the other.

In his lecture and slide show, Gehl talked of how in Copenhagen they had added bike lanes and additional sidewalk space by converting most four-lane streets to two lanes. Looking back over the last few decades, Gehl showed how big urban cities like Barcelona, Melbourne, Copenhagen and others are "reclaiming" their public spaces and streets for pedestrians by putting less emphasis on accommodating cars. He mentioned how in 1962, all of Copenhagen's principal squares, 18 of them, were being used for parking lots. Now all are used for public life. Gehl said that he sees enormous potential for similar improvements in New York City.

The Dept. of Transportation's press office declined to comment on Gehl's work at this time. In an interview with Streetsblog in June, DOT Commissioner Janette Sadik-Khan said she was "hoping to bring Gehl over at the end of next month to help us work on a pedestrian and public space strategy much like what he did for London."

Photo: Aaron Naparstek

Streetsblog interviewed DOT Commissioner Janette Sadik-Khan at 40 Worth St., Monday, June 18

Janette Sadik-Khan: Four days.

Streetsblog: Left in the legislative session?

JSK: Yeah, well, maybe four days left, maybe more days. August in Albany. What can be better?

SB: (Laughing) So, let's start with something other than congestion pricing. How was your trip to Copenhagen to meet with Jan Gehl? Had you ever been before?

JSK: Never been.

SB: What did you think?

JSK: I thought it was spectacular. The experience of riding a bicycle in a city in which the car is not the priority was really inspiring. One piece that was a bit of a surprise was how well behaved people were in Copenhagen. I didn't see a single person break a single traffic law while I was there which is certainly a little different than the experience that we have here.

SB: I noticed the same thing when I was there last fall but every Copenhagener I asked insisted they were just as rude and unruly as New Yorkers.

JSK: Gehl went through the historic trajectory of how they've reclaimed public space bit by bit, one street at a time. Today, they've reached a tipping point where 36 percent of the people commuting to work are on bike and they're looking to get that mode share up to 40 percent.

The other thing that amazed me is that there are all of these bikes parked all over the place and it appears that none of them are locked. They all have these small black handcuffs on the rear wheel. You turn the key and this steel rod comes through and locks it up. How long do you think that would last on the streets of New York City? Ten minutes?

So, there are definite cultural elements that make Copenhagen Copenhagen and need to be adapted to work in New York. But the design of the streets and their approach to the streets are really interesting and I'm hoping to bring Gehl over at the end of next month to help us work on a pedestrian and public space strategy much like what he did for London.

SB: Would you have him work in a specific location or citywide?

JSK: We need to be able to show what can be done in all five boroughs with a variety of different techniques. But not everything needs to be a massive capital project. I'm looking to see what we can do on a shorter term basis to have some immediate impact in reclaiming streets and coming up with different designs for roadways and sidewalks.

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