The U.S. trucking trade group American Trucking Associations along with truck maker Navistar International (NAV) - Get Report on Wednesday urged a U.S. Senate panel to include autonomous commercial trucks in proposed legislation that would expedite self-driving vehicles to market, Reuters reports.

Last week, the House unanimously approved a bill to speed up the adoption of autonomous vehicles and restrict states from limiting their use. But the bill only applied to cars under 10,000 pounds, and the Senate is now contemplating whether to add larger commercial trucks to the legislation.

"It's important for industry to participate in the creation of advanced driving technologies now," said Navistar CEO Troy Clarke said in testimony before the Senate Commerce Committee. "Providing clarity on the legislative and regulatory front will allow us, truck manufacturers, to design and validate systems that meet the future needs of our customers."

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Shares of Navistar were climbing over 2% in afternoon trading on Wednesday. 

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