Next, Mike set up product and Web site traffic meetings that busted barriers at the top.

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But the courthouse has since increased security, installing thick metal barriers to block traffic on the side and back of the building.

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The prime minister said the government would work with architects and designers to encourage them to build with blast-resistant materials and introduce traffic control measures like large barriers or vehicle-exclusion zones.

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Sections of the road have collapsed before with barriers put in place, effectively creating single-file traffic.

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AirFlash, a Silicon Valley firm, has developed algorithms that find the closest hotel or cinema to a user's cellphone, taking into account geographical barriers such as rivers and, in the future, traffic conditions.

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Some advocates wants billion-dollar barriers constructed to seal off Lake Michigan from the Mississippi watershed, which opponents say would disrupt shipping traffic and cause flooding around Chicago.

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