Marathons wreck havoc on city traffic. But what about pedestrians who just want to cross the street? Marathon organizers have developed a multistep system that is a pretty damn creative way of moving pedestrians across the race course without disrupting the race. 

Here’s the system in action: 

At one end, volunteers use a string to funnel racers toward one side to allow groups of pedestrians to cross. A fancier solution? Temporary bridges, such as these used during the London Marathon.

An interesting read via GOOD

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