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This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

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Streets can be a dangerous place for bicycles.

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In 2013, nearly 750 cyclists were killed in the U.S.from being hit by a car.

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And of the 48,000 cycling injuries that were reported that year, nearly a third involved a motor vehicle.

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Now, a new study suggests that signs sporting just five words could help show drivers and biker-riders how to share the road.

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By not saying "share the road."

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In all 50 states, traffic regulations state that bikes should be treated as vehicles.

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Which means that they have the same rights as cars when it comes to using the roads.

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But those rules are not always clear.

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Signs that urge motorists to "Share the road" are ambiguous.

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Cyclists may assume they mean that cars should make room for bikes.

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But some drivers may think they're saying that bikes should get out of the way of traffic.

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To see how such signs influence how people think about bike-riders' rights, researchers recruited 1,800 volunteers to take a quick survey.

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Subjects were shown one of four images.

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Some saw a street with a traditional "share the road" sign;

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some saw an image of a bicycle painted on the pavement in a shared lane;

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some saw signs that read "bicycles may use full lane";

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and some saw a street with no instructions at all.

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They then answered some questions about road etiquette.

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Turns out that folks who saw the sign explicitly noting that bikes can use the full lane were the most likely to recognize cyclists' rights to be on the road.

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And the ambiguous "share the road" suggestion?

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It had about the same influence on the study subjects as no sign at all.

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The findings appear in the journal PLoS One.

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So remember, bicycles may indeed use the full lane.

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And everyone on the road should use their full brain.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.

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