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Archive for February 26th, 2009

Will ‘Less is More’ Work in New York City?

A sub-theme articulated in Traffic is the “slower is faster principle,” in which reductions in capacity or seeming performance can actually lead to no worse — and often better — outcomes vis a vis traffic flow.

I was thus intrigued to note, via the New York Times:

The city plans to close several blocks of Broadway to vehicle traffic through Times Square and Herald Square, an experiment that would turn swaths of the Great White Way into pedestrian malls and continue Mayor Michael R. Bloomberg’s effort to reduce traffic congestion in Midtown.

Broadway traffic would also be barred in Herald Square.

Although it seems counterintuitive, officials believe the move will actually improve the overall flow of traffic, because the diagonal path of Broadway tends to disrupt traffic where it intersects with other streets…

… [Jeff Zupan] said Broadway tended to foul up traffic at each intersection with an avenue. To allow for green lights on Broadway, the duration of the green lights on the avenues and cross streets had to be shortened, backing up traffic.

“The lower the volume is on Broadway — or if you eliminate it altogether — then traffic is going to move better,” Mr. Zupan said. “That’s one of the positive things that’s going to come out of this. The win-win is that the space that you’re freeing up will be used by pedestrians.”

What will be gained, depicted below via Streetsblog, is a rare pedestrian refuge (and a shorter, safer pedestrian crossing) in an unwelcoming area where foot-traffic seems to dwarf vehicular traffic. And while the results on traffic flow will certainly be worth following, that of course should not be the only consideration in judging the project’s success or failure. While not as radical perhaps as the early 1970s Madison Avenue pedestrianization, this one may have a better chance of succeeding.

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Posted on Thursday, February 26th, 2009 at 4:23 pm by: Tom Vanderbilt
2 Comments. Click here to leave a comment.

Fooled Drivers, or Foolish Drivers?

I’m not sure if, lurking somewhere in NHTSA’s databases, there’s a category for “Car-House Crash” (no worries about coding for culpability there!), but, judging by the news reports I get, it happens more than you’d think.

It recently happened to a man in Toronto. Twice. Within three weeks. The article in the Toronto Star notes that residents and engineers think poor road design is to blame:

Johansen and other area residents blame the accidents on a reconfiguration of the Park Lawn-South Kingslea intersection a few years ago. The new intersection was moved a few metres west, and curves to the left just before the stop sign. But a laneway to the right, near the stop sign, can create an optical illusion that may fool some drivers into thinking it’s South Kingslea, and that the stop sign is in a traffic island in the middle of the intersection. As a result, they end up on the wrong side of the sign.

At least that’s the theory of Allan Smithies, who’s in charge of traffic planning in that area.

I haven’t been to the intersection in question, and it’s hard to draw inference from a photo, but as pictured above, I’m not quite sure what the source of confusion is. I see a Stop Sign, I quite plainly see a house. More importantly, I see other houses. It is a neighborhood. Neighborhoods are places where you don’t drive at speeds that would prevent you from not being able to crash into a house.

The local response was to place a set of “jersey barriers” in front of the house. The idea of living like the American embassy in Beruit didn’t please the homeowner.

But after assessing the path of the two vehicles that ended up in his house, Johansen said the barricade would be more likely to stop another vehicle if it was put up on the other side of South Kingslea, next to the stop sign and across the sidewalk on the east side of Park Lawn.

“I don’t want that ugly cement wall across my front yard, especially when it won’t stop another car,” unless it’s positioned across the laneway, he explained.

Rather than allow the barrier to be dropped in his yard, which he says would stigmatize his home as the target for airborne vehicles and not prevent further assaults, Johansen said he told city workers to stick it.

I can utterly side with the homeowner’s sentiment on this. Residential streets are not meant to be places for guard-rails, concrete barriers, and other aspects of the “forgiving road,” just as residents should not have to wear crash helmets when they go out for a walk. As I’ve argued here before, I’d rather see trees planted mid-block, every block, in the center of the block. Apart from that, there must be some better solution here than jersey barriers, any host of traffic calming treatments.

Of course, one doesn’t usually have to dig too deep in these stories to find the real source of the problem.

Around 1 a.m. yesterday, a car driven by a 25-year-old man hit a curb, flew through the master bedroom window of the house and landed on the residents’ bed. Police say alcohol was a factor in the crash and the driver has been charged with impaired driving.

This takes “breaking and entering” to a new level. But in any case, we see that it wasn’t necessarily some strange road illusion causing the problem, it was the fact that the driver was hammered. He was creating his own illusions.

What’s more, the article notes:

Neighbours in the area say many people don’t heed the nearby stop sign, which has been taken out a few times by previous collisions.

Now, I agree that good design of any sort should help users avoid unnecessary mistakes, or at least not make them more prone to make mistakes (TV remote-controls are notorious for this). But at what point do we say enough’s enough? As Hans Monderman has said, there are some drivers which no road can save. As, I’ve argued in Traffic, bringing the “foolproof” design of the forgiving road into places like neighborhoods not only cheapens the neighborhood, it increases the risk-taking behavior of drivers. I noticed that one poster referred to the fact that the “sightlines” were good; the problem with “sight distance” is that drivers simply consume the extra visibility with greater speed. It could even be that the stop sign itself is a problem — drivers are looking at that rather than scanning the actual terrain. Or maybe it’s just a Canadian snow and ice thing.

Now, I realize I’m sounding off here, and I recognize that traffic engineers, who must wrestle with the many-footed beast of human behavior, do not have an easy job by any means. If this finds its way to Mr. Smithies (or the homeowners) I’d be curious to hear more about the case.

(Horn honk to David)

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Posted on Thursday, February 26th, 2009 at 10:45 am by: Tom Vanderbilt
4 Comments. Click here to leave a comment.

Decongestion

Given that things like “same-store traffic” have been dropping, it’s no surprise that vehicular traffic has eased. Via the WSJ:

On average, Americans spent 13 fewer hours stuck in traffic in 2008 than in 2007, according to an annual road traffic report released Wednesday by Inrix. Inrix collects data on road congestion, in part, from a million vehicles equipped with GPS-enabled devices like cellphones and car navigation systems. Inrix cited volatile fuel prices as one reason for the decline in road travel, along with the economy. Some of the findings from the report:

– Riverside, Calif., with the third-highest level of home foreclosure activity last year, saw the highest drop in traffic congestion.

– Detroit, where unemployment rose about 21%, saw the second largest decrease in congestion, tied with San Diego.

– The most dramatic drop in congestion occurred on Wednesdays, with a 31% drop.

– 99 out 100 most populous cities tracked by Inrix saw a decrease in traffic congestion last year from the previous year. The one city where traffic got worse last year: Baton Rouge, which saw a 6% increase in congestion from 2007.

Detroit is obvious, less sure about why Wednesday would see a particularly big drop.

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Posted on Thursday, February 26th, 2009 at 9:13 am by: Tom Vanderbilt
3 Comments. Click here to leave a comment.
Traffic Tom Vanderbilt

How We Drive is the companion blog to Tom Vanderbilt’s New York Times bestselling book, Traffic: Why We Drive the Way We Do (and What It Says About Us), published by Alfred A. Knopf in the U.S. and Canada, Penguin in the U.K, and in languages other than English by a number of other fine publishers worldwide.

Please send tips, news, research papers, links, photos (bad road signs, outrageous bumper stickers, spectacularly awful acts of driving or parking or anything traffic-related), or ideas for my Slate.com Transport column to me at: info@howwedrive.com.

For publicity inquiries, please contact Kate Runde at Vintage: krunde@randomhouse.com.

For editorial inquiries, please contact Zoe Pagnamenta at The Zoe Pagnamenta Agency: zoe@zpagency.com.

For speaking engagement inquiries, please contact
Kim Thornton at the Random House Speakers Bureau: rhspeakers@randomhouse.com.

Order Traffic from:

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Traffic UK
Drive-on-the-left types can order the book from Amazon.co.uk.

For UK publicity enquiries please contact Rosie Glaisher at Penguin.

Upcoming Talks

April 9, 2008.
California Office of Traffic Safety Summit
San Francisco, CA.

May 19, 2009
University of Minnesota Center for Transportation Studies
Bloomington, MN

June 23, 2009
Driving Assessment 2009
Big Sky, Montana

June 26, 2009
PRI World Congress
Rotterdam, The Netherlands

June 27, 2009
Day of Architecture
Utrecht, The Netherlands

July 13, 2009
Association of Transportation Safety Information Professionals (ATSIP)
Phoenix, AZ.

August 12-14
Texas Department of Transportation “Save a Life Summit”
San Antonio, Texas

September 2, 2009
Governors Highway Safety Association Annual Meeting
Savannah, Georgia

September 11, 2009
Oregon Transportation Summit
Portland, Oregon

October 8
Honda R&D Americas
Raymond, Ohio

October 10-11
INFORMS Roundtable
San Diego, CA

October 21, 2009
California State University-San Bernardino, Leonard Transportation Center
San Bernardino, CA

November 5
Southern New England Planning Association Planning Conference
Uncasville, Connecticut

January 6
Texas Transportation Forum
Austin, TX

January 19
Yale University
(with Donald Shoup; details to come)

Monday, February 22
Yale University School of Architecture
Eero Saarinen Lecture

Friday, March 19
University of Delaware
Delaware Center for Transportation

April 5-7
University of Utah
Salt Lake City
McMurrin Lectureship

April 19
International Bridge, Tunnel and Turnpike Association (Organization Management Workshop)
Austin, Texas

Monday, April 26
Edmonton Traffic Safety Conference
Edmonton, Canada

Monday, June 7
Canadian Association of Road Safety Professionals
Niagara Falls, Ontario

Wednesday, July 6
Fondo de Prevención Vial
Bogotá, Colombia

Tuesday, August 31
Royal Automobile Club
Perth, Australia

Wednesday, September 1
Australasian Road Safety Conference
Canberra, Australia

Wednesday, September 22

Wisconsin Department of Transportation’s
Traffic Incident Management Enhancement Program
Statewide Conference
Wisconsin Dells, WI

Wednesday, October 20
Rutgers University
Center for Advanced Infrastructure and Transportation
Piscataway, NJ

Tuesday, March 8, 2011
Ontario Injury Prevention Resource Centre
Injury Prevention Forum
Toronto

Monday, May 2
Idaho Public Driver Education Conference
Boise, Idaho

Tuesday, June 2, 2011
California Association of Cities
Costa Mesa, California

Sunday, August 21, 2011
American Association of Motor Vehicle Administrators
Milwaukee, Wisconsin

Wednesday, October 26, 2011
Attitudes: Iniciativa Social de Audi
Madrid, Spain

April 16, 2012
Institute for Sensible Transport Seminar
Gardens Theatre, QUT
Brisbane, Australia

April 17, 2012
Institute for Sensible Transport Seminar
Centennial Plaza, Sydney
Sydney, Australia

April 19, 2012
Institute for Sensible Transport Seminar
Melbourne Town Hall
Melbourne, Australia

January 30, 2013
University of Minnesota City Engineers Association Meeting
Minneapolis, MN

January 31, 2013
Metropolis and Mobile Life
School of Architecture, University of Toronto

February 22, 2013
ISL Engineering
Edmonton, Canada

March 1, 2013
Australian Road Summit
Melbourne, Australia

May 8, 2013
New York State Association of
Transportation Engineers
Rochester, NY

August 18, 2013
BoingBoing.com “Ingenuity” Conference
San Francisco, CA

September 26, 2013
TransComm 2013
(Meeting of American Association
of State Highway and Transportation
Officials’ Subcommittee on Transportation
Communications.
Grand Rapids MI

 

 

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