SAN DIEGO — IC Bus plans to enter the motorcoach market in 2010, the company announced at the American Public Transportation Association Expo here earlier this week.

The school and commercial bus manufacturer showed attendees a rendering of its concept coach, which officials said will leverage parent company Navistar’s strengths in aerodynamic design, quiet and fuel-efficient engines, and safety.

“Motorcoaches are the next logical step in product development for IC Bus and are a tangible example of how Navistar leverages design elements across its businesses,” said John McKinney, VP and general manager of IC Bus.

David Hillman, director of bus marketing, said that aerodynamic design will be a key factor in providing enhanced fuel economy. “Extensive wind tunnel and aerodynamics experience can help design the bus to positively affect airflow around the total vehicle,” he said.