example
In Japan, the number of accidents due to aging infrastructures has increased in the last 10 years.
Meanwhile, there is a country overseas where aging infrastructure has become a social problem before Japan. That country is America.
In 1929, stock prices crashed on the New York Stock Exchange. After that, Franklin Roosevelt (hereinafter: Roosevelt) was
elected in the presidential election.
Roosevelt urgently needed to get America back on its feet.
Roosevelt's policy was called the New Deal. The New Deal policy expanded public works projects in the United States,
which was overflowing with unemployed people, and opened up jobs.
Some of the projects include utilities maintenance, and large-scale infrastructure development.
As expected for infrastructure that has been developed all at once, their deterioration suddenly accelerated.
It was in the 1980s that aging infrastructure became a serious problem in the United States.
It affected people's lives in many ways.
For example, schoolchildren commuting to school by school bus had to take a detour due to weight restrictions on bridges,
or were forced to get off the school bus before the bridge and walk across.
Such an America was called "America in ruins".
Finally, I would like to introduce an accident that actually happened in the United States.
Case 3 Silver Bridge Collapse Accident
When:Mid-December 1963
Location:Ohio, USA
OverviewThe Silver Bridge connecting Ohio and Virginia suddenly collapsed.
31 vehicles were involved during the busiest time of the year for Christmas shopping, resulting in 46 deaths and 18 injuries.
It was found that the cause of the collapse was the deterioration of a suspension chain link, which was part of the basic structure of the bridge.
