Friday, December 17, 2010

Plastic Rings on Tires Make Buses Safer

Checking the bright green rings is a required step when bus drivers inspect their buses before they go on the road in Houston, Texas.

From the Metropolitan Transit Authority of Houston, Texas.

A loose wheel nut on a tire can spell disaster if you're driving a bus.

Now METRO has installed tiny, neon-green triangular rings that are giving passengers a safer ride. Wheel-Check is a loose wheel-nut indicator. The plastic rings sit on top of lug nuts.

Click here to read the full story on Metro Blog

"If all goes well with the lug nuts, the Wheel-Checks will all point in the same direction," said Larry Hewitt, METRO director of maintenance support functions. "If a lug nut becomes loose, then the Wheel-Checks will point out of position or sequence."

Each ring cost 32 cents and allows bus operators to do a simple visual check to find out if a lug nut is loose. Wheel-Checks are also heat sensitive and can signal hot-wheel conditions caused by a tight brake or wheel bearing problem. If the temperature soars higher than 248 degrees Fahrenheit, the circumference of the ring will blister and distort.