Marvell-Elaine Schools bus driver Larry Greer's route twists through the Arkansas Delta, between the White and Mississippi rivers. "All together I go from Elaine to Snow Lake, 65 miles round trip," he said, while elementary school kids filed onto his bus for the afternoon ride home. These are country bus stops along country roads. The way is long. In the morning, Greer says, he will wait only so long at an empty stop before he snaps his levered doors closed again. "