It would allow a credit of 25 percent of the cost of passes, up to a total of $50.
The bill died previously because several members said they believe it will not attract new riders to help clean the air, but merely subsidize existing riders. Those objections were raised again.
"I don't see how this isn't anything more than a subsidy for those who already use it," said Rep. Jacob Anderegg, R-Lehi. "You will pick up some [new riders] but I don't think it is anywhere near what you think."
But Poulson said the bill expires after five years, so lawmakers could evaluate its success then before deciding to extend or expand it.
Bruce Jones, general counsel for the Utah Transit Authority, said wording of the bill likely won't affect annual pass holders so it should attract new riders wanting to try the system and help clear the air. He said UTA plans to feature the credit in advertising.
Legislative fiscal analysts estimate the credit would cost the state $477,000 a year. Rep. Steve Eliason, R-Sandy, said the bill still must compete among numerous other clean-air bills for limited money available to fund them. "We'll sort out which bring the biggest bang for the buck," he said.