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Marked crosswalks may pose risk to older pedestrians

Researchers found that marked crosswalks increase the risk of injury for older adults, who face a 3.6 times greater risk when crossing at intersections without traffic signals or stop signs. The study suggests that older pedestrians should avoid relying on marked crosswalks and instead use signals or signs to identify safe crossing areas.

SourceUniversity of Washington·JournalJAMA·DateNov 5, 2002

Cyber jams

Researchers aim to optimize internet traffic flow by allocating available capacity fairly among competing packets of information. A new algorithm developed could be applied to various networks, including telephone systems and power grids.