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News
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High
Temperatures
May Cause Pavement Blowups
Posted 22 July 2010
Motorists traveling
in Iowa should remain aware that the mercury might not be the only
thing to rise during the sweltering summer heat. Pavement blowups occur
when thermal expansion forces the pavement to buckle and shatter.
“When you have a wet period followed by a hot week, you get conditions
that are right for some pavements to blow up,” says Bob Younie,
director of the Iowa Department of Transportation’s (DOT) Office of
Maintenance.
“Iowa DOT maintenance equipment operators spend 2,000 to 4,000 hours
making temporary repairs of pavement blowups and another 6,000 hours
replacing these pavement sections, costing $400,000 each year. Many of
the blowups only result in a spall, pothole or small chunks of concrete
lying around the pavement joints, but they must still be repaired,”
said Younie.
Unlike scheduled maintenance, pavement blowups occur spontaneously and
motorists receive little or no warning in the initial minutes following
a blowup. Once a blowup is reported, it takes time to erect a work zone
and notify the public.
The Iowa DOT urges motorists to pay special attention to pavement
surfaces when driving during afternoons with 90-degree or hotter
temperatures. Use caution and reduce your speed when approaching broken
pavement areas.
Motorists who witness a pavement blowup are asked to contact the
nearest law enforcement agency to ensure traffic is routed around the
blowup until work zone signage and repair crews are on the scene.
For the most recent statewide travel information, including incident
reports, visit 511ia.org or
call 511 or 800-288-1047.
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