In this fall's election, traffic wasn't a top issue for voters. But now, two organizations - a business group and a non-profit promoting biking and walking - are studying reducing congestion, in part by charging drivers who bring cars into Midtown.The groups say failing to address the issue will take a heavy toll on New York's economy, air quality, and public health. And they're hoping to win Mayor Bloomberg's support. WNYC's Andrea Bernstein reports.[Follow link on the WNYC page to listen to the full audio story: http://www.wnyc.org/news/articles/54123]