After years of neglect, momentum is building for an improved public transit system in Oklahoma City.

If it happens, it could have a dramatic effect on ozone pollution.

Light rail is at the center of early discussions about a possible MAPS 3 proposal. But city leaders and environmental advocates agree such relief could take a decade or more, meaning the city will need to look elsewhere to avoid falling out of compliance with clean air standards this summer.

"If we could have a public transportation system tomorrow, I think we would all take it," said Jennifer Gooden, co-founder of Sustainable OKC. "We really have to do something in the short term."

Automobiles account for more than 60 percent of the city's ozone pollution, according to the state Department of Environmental Quality.

Oklahoma City Mayor Mick Cornett said a long-term air quality solution must include reducing automobile pollution, and that public transportation will play a big role.

A recent Internet survey by the city shows public transit is by far the most popular idea for a potential MAPS 3 proposal. Cornett said the survey shows the city hasn't done enough to support public transit and is continuing to fall behind.