The future of transit in Chatham County’s western suburbs should involve more than buses, a transportation researcher from the University of South Florida said Tuesday. Rob Gregg, who’s with the college’s Center for Urban Transit Research, told the Chatham Area Transit board of directors the most effective program CAT could start in western suburban areas like Pooler would be a van pool to provide people who live and work near each other a shared ride to work. Gregg and a colleague with the Center for Urban Transit Research are wrapping up a feasibility study that CAT requested earlier this year.