"TAP não sobrevive se se mantiver pública", garante Pinto Luz

[carrancho]

mas houve um miudo que morreu ao carregar num !

e agora fico sempre com a sensação que as pessoas não carregam por ter medo de morre...

Quando ontem li o tópico lembrei-me logo disso. Eu não carrego... mas normalmente também só passo do outro lado

Agora, se querem ver tudo, mesmo tudo, a carregar no botão... basta colocar uma plaquinha por cima a dizer... "Não carregue no botão"

[pvg80713]

mas houve um miudo que morreu ao carregar num !

e agora fico sempre com a sensação que as pessoas não carregam por ter medo de morre...

[Automech]

Engraçado, exactamente ontem, a atravessar a av da liberdade, pensei no mesmo. Depois decidi carregar, só para desencargo de consciência, não fosse a coisa ser mais do que um placebo. Mas sempre achei que era um placebo posto lá só para nos distrair.

Acho que é mesmo placebo Pata. Pelo menos na av. da liberdade passo imensas vezes e, se funcionam, então sou eu que tenho sempre azar...

E agora que se fala nisso, assim de repente não me lembro de nenhum em Lisboa em que tenha ficado com a sensação de funcionar.

Onde penso que funcionam mesmo é naqueles sitios onde existem limitadores de velocidade a 50 e em povoações que são atravessadas por uma via com muito tráfego e têm um semáforo para o pessoal passar.

[Pata-Hari]

Engraçado, exactamente ontem, a atravessar a av da liberdade, pensei no mesmo. Depois decidi carregar, só para desencargo de consciência, não fosse a coisa ser mais do que um placebo. Mas sempre achei que era um placebo posto lá só para nos distrair.

[MarcoAntonio]

Isto é giro e não é totalmente off-topic...

For Exercise in New York Futility, Push Button
By MICHAEL LUO
Published: February 27, 2004

For years, at thousands of New York City intersections, well-worn push buttons have offered harried walkers a rare promise of control over their pedestrian lives. The signs mounted above explained their purpose:


To Cross Street

Push Button

Wait for Walk Signal

Dept. of Transportation

Millions of dutiful city residents and tourists have pushed them over the years, thinking it would help speed them in their journeys. Many trusting souls might have believed they actually worked. Others, more cynical, might have suspected they were broken but pushed anyway, out of habit, or in the off chance they might bring a walk sign more quickly.

As it turns out, the cynics were right.

The city deactivated most of the pedestrian buttons long ago with the emergence of computer-controlled traffic signals, even as an unwitting public continued to push on, according to city Department of Transportation officials. More than 2,500 of the 3,250 walk buttons that still exist function essentially as mechanical placebos, city figures show. Any benefit from them is only imagined.

"I always push," said Réna, an employee at Long Island College Hospital in Cobble Hill, Brooklyn, who was too embarrassed to give her last name after she pushed a button on Atlantic Avenue and was told the truth. "The sign says push, so I push. I think it works."

Most of the buttons scattered through the city, mainly outside of Manhattan, are relics of the 1970's, before computers began tightly choreographing traffic signal patterns on major arteries. They were installed at a time when traffic was much lighter, said Michael Primeggia, deputy commissioner of traffic operations for the city's Transportation Department.

The first "semi-actuated signal," as they are called by traffic engineers, is believed to have appeared in the city in 1964, a brainstorm of the legendary traffic commissioner, Henry Barnes, the inventor of the "Barnes Dance," the traffic system that stops all vehicles in the intersection and allows pedestrians to cross in every direction at the same time. Barnes was also instrumental in completing the one-way conversion of major avenues in New York.

Typically, they were positioned at intersections of a major thoroughfare and a minor street. The major road would have a green light until someone pressed the button or a sensor in the roadway detected a car on the minor street. Then, after 90 seconds or so, the light would change.

The goal, Mr. Primeggia said, was to make traffic flow on the major artery more efficient. The buttons made sense when traffic was generally minimal on the minor street. But as traffic grew steadily, their existence became imperiled.

In 1975, about 750,000 cars entered Manhattan daily; this past holiday season, there were more than 1.1 million. The other boroughs have gone through similar growth, Mr. Primeggia said. As even minor streets became congested, the need for the semi-actuated signal largely disappeared, because they were constantly being tripped anyway by cars rolling up to the intersection. Many walk buttons also interfered with the computer-programmed coordination of lights that is now the rule in the city to facilitate traffic flow.

By the late 1980's, most of the buttons had been deactivated, their steel exteriors masking the lie within. But city officials say they do not remember ever publishing an obituary, and the white and black signs stayed up, many of them looking as new and official as ever.

"I don't always push, but I do it in the off-chance that I might save two seconds," said Joanne Downes, 63, a retired nursing professor, after pushing a broken button to cross the West Side Highway from Chelsea Piers on West 23rd Street yesterday morning. "I have guessed that they don't work, but why are they there?"

There are 750 locations where the buttons actually do work, Mr. Primeggia said. Some of them have been installed more recently, while others are holdovers from two decades ago. The working buttons are only at intersections where the walk signal will never come unless the button is pushed or a car trips the sensor, Mr. Primeggia said. He cited two examples, one at Hicks and Summitt Streets in Brooklyn and the other on Flatbush Avenue just south of the Belt Parkway exit ramp. But other working push buttons are hard to find. A random survey of more than 30 intersections in Brooklyn, Queens and Manhattan found one, at Marathon Parkway and 51st Avenue in Little Neck, Queens, that worked.

At $300 or $400 per intersection, it would cost about $1 million to remove the disconnected mechanisms, Mr. Primeggia said. About 500 have been removed during the course of major reconstruction projects. But city officials over the years decided it was not worth the cost for the rest, given other needs like rebuilding roads or installing new traffic signals.

"We think of this from time to time," Mr. Primeggia said. "But there's always a better need for the money."

And in the bigger scheme of things, he said, it doesn't really matter if people push a working button. "The public is going to get the walk signal regardless," he said. "I guess that's the point. There's no harm in having it at the locations."

Many veteran New Yorkers have long learned to ignore them. They have never made sense, said Maryam Ceesay, 24, standing at a downtown Brooklyn push-button intersection. If pedestrians could simply push them and always get a walk signal, "cars would never cross," she said. "Traffic would stop."

But Ms. Ceesay was at that moment baby-sitting 4-year-old Benjamin Miles. Despite his baby-sitter's explanations that the buttons "never work," Benjamin still pushed away at the intersection of Atlantic Avenue and Henry Street. Why?

His explanation may be the best reason for the continued existence of the buttons.

"Because," he said, "it's fun."

http://www.nytimes.com/2004/02/27/nyreg ... 1393218000