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Crowd researchers make pilgrimage safer

The science of pedestrian motion meets the annual Hajj in Mecca.

Multiple entry points in the design of the future Jamarat bridge should help to reduce crowding even further.For more images and video, visit Helbing's website
Pilgrims directed along one-way routes can follow the flow, avoiding dangerous crush points.


  1. Helbing D., et al. preprint available at

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The Hajj

Stoning of the Jamarat

Official Saudi Hajj website

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Ball, P. Crowd researchers make pilgrimage safer. Nature (2007).

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