In the past, there was often an automatic reaction to increased traffic: just widen the roads, says Mark Poch, the Bellevue Transportation Department's traffic engineering manager.

贝尔维尤运输部交通工程经理马克·波奇说，过去，人们对交通量的增加往往有一种自动的反应：只要拓宽道路就行了。

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"Some parents think this is a drop-off daycare where they can sit here and (barely) watch their kids, " says Ms. Poch, adding that most kids do obey when asked to calm down.

WSJ: If Kids Can Play, Will Mom Shop?

For the first time in Argentina, the pilots of those "death flights" are on trial, among them former naval lieutenant Julio Poch, who was extradited to Argentina from Spain in 2010 after allegedly confessing to the part he played to colleagues at the Dutch airline Transavia.

BBC: Largest trial of 'Dirty War' crimes starts in Argentina