Walking is a superior exercise and the best for many seniors. But more than 170,000 pedestrians are injured walking along roads each year, and more than 4,700 died in 2006.

Safety: Walk on the sidewalk. If there is none, walk facing oncoming traffic.

To be more visible to drivers: Wear light-colored clothing and reflective accessories at night, and stay clear of obstacles such as parked cars and hedges. Cross streets only where drivers expect you to, at corners and crosswalks.

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