Kiser suggested Harper separate the bills, but Harper said he'd go back and work with city officials on the proposal.
"We will be back with it this session," he said.
The bill brought Salt Lake City Mayor Ralph Becker to testify against it saying the state was attempting to trample a local government's rights to do what its citizens want. He said Salt Lake City has a different mindset than other parts of the state and a city should be allowed to regulate based on the population's wishes.
"As a local government, we certainly recognize and accept we are subject to the laws of the state," Becker said. "We value our relationship. We also hope the state will respect our differences."
The anti-idling ordinance was passed unanimously by the Salt Lake City Council in October and it would levy fines upwards of $100 against violators after several warnings had been issued. But Becker said the ordinance was never intended to generate revenue.
Instead, Cherise Udell, founder and president of Utah Moms for Clean Air, said it was a way to put teeth into a law that was similar to the anti-littering campaigns that sprang up in the '70s. She said with fines and public education, it is rare to see people toss trash out of their moving vehicles anymore.
"Over time, people got educated on the issue," Udell said. "I see the idling law in the same spirit."
Harper's bill also was met with support from cab companies that complained the city's requirement to replace older vehicles was burdensome on the business.
Mark Hatch of Yellow Cab said cars are already more fuel efficient than they were when the company started 35 years ago and that the fleet is continually evolving with cars that pollute less making the ordinance unnecessary.