HOUSTON (AP) - The Houston Chronicle reports Texas Department of Transportation records show that over the past 20 years no Houston-area highway routes designated for transport of hazardous chemicals have been updated and government officials appear befuddled over who has the authority to do so.

The newspaper also reports that 40 years after an ammonia truck crash killed six people and injured 178 others along the city's Interstate Loop 610, the city's population has doubled in size and is more vulnerable to another catastrophic accident.

About 400 trucks a day loaded with tons of hazardous chemicals travel Houston's inner loop freeway. Houston's former air pollution control chief, Kenneth MacKenzie, says with every kind of chemical in the world coming through Houston, the city's been very fortunate to avoid many serious problems.


Information from: Houston Chronicle, http://www.houstonchronicle.com

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