l****z
发帖数: 29846 | 1 “这怎么会安全？”节能交通信号灯不能融化落雪，结果被覆盖，在美国各地导致几十
起交通事故，包括1例死亡
http://news.yahoo.com/s/ap/20091215/ap_on_re_us/us_snow_covered_stoplights
MILWAUKEE – Cities around the country that have installed energy-efficient
traffic lights are discovering a hazardous downside: The bulbs don't burn
hot enough to melt snow and can become crusted over in a storm — a problem
blamed for dozens of accidents and at least one death.
"I've never had to put up with this in the past," said Duane Kassens, a
driver from West Bend | a****l
发帖数: 8211 | 2 I think this is very normal during engineering process. Quite often when you
fixed some problem, other hidden problem comes out.
efficient
problem
t
【在 l****z 的大作中提到】
: “这怎么会安全？”节能交通信号灯不能融化落雪，结果被覆盖，在美国各地导致几十
: 起交通事故，包括1例死亡
: http://news.yahoo.com/s/ap/20091215/ap_on_re_us/us_snow_covered_stoplights
: MILWAUKEE – Cities around the country that have installed energy-efficient
: traffic lights are discovering a hazardous downside: The bulbs don't burn
: hot enough to melt snow and can become crusted over in a storm — a problem
: blamed for dozens of accidents and at least one death.
: "I've never had to put up with this in the past," said Duane Kassens, a
: driver from West Bend
| e***s
发帖数: 1397 | 3 "...possible solutions:
installing weather shields,
adding heating elements like those used in airport runway lights, coating
the lights with water-repellent substances..."
How much money will all these technologies and devices cost?
How much carbon will have to be burned during the manufacturing process of
these remedies?
How much more labor cost will be involved to fix the more complicated
engineering design in the long run?
It sounds like the best solution would be to hire more union workers
【在 l****z 的大作中提到】
: “这怎么会安全？”节能交通信号灯不能融化落雪，结果被覆盖，在美国各地导致几十
: 起交通事故，包括1例死亡
: http://news.yahoo.com/s/ap/20091215/ap_on_re_us/us_snow_covered_stoplights
: MILWAUKEE – Cities around the country that have installed energy-efficient
: traffic lights are discovering a hazardous downside: The bulbs don't burn
: hot enough to melt snow and can become crusted over in a storm — a problem
: blamed for dozens of accidents and at least one death.
: "I've never had to put up with this in the past," said Duane Kassens, a
: driver from West Bend
| l******a
发帖数: 3803 | 4
actually, as you pointed out, the energy consumption of traffic lights
across the nation does not come up with a negligible number. why bother with
that?
It's different story when it comes to hundred millions of homes and offices
that account for a big chunk of energy use.
【在 e***s 的大作中提到】
: "...possible solutions:
: installing weather shields,
: adding heating elements like those used in airport runway lights, coating
: the lights with water-repellent substances..."
: How much money will all these technologies and devices cost?
: How much carbon will have to be burned during the manufacturing process of
: these remedies?
: How much more labor cost will be involved to fix the more complicated
: engineering design in the long run?
: It sounds like the best solution would be to hire more union workers
|
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