Business travelers are shifting to coach and less expensive hotel rooms and are traveling less in general as companies rein in spending to cope with the economic downturn. The development has prompted airlines, hotels and other travel suppliers to direct their promotions at corporate travelers. Mark Kiefer, an aviation consultant at CRA International, said the economy is continuing to limit business travel. "We have a case of certain sectors that were consumers of a lot of business travel, like banking and so forth," Kiefer said. "The other issue we are grappling with are expectations. There is a lot of uncertainty about when the economy will turn around and by how much."