The grip of Tammy McNair’s leather-gloved hands tightened as she watched the red light turn to green. Her foot eased off the brake as she spun the wide steering wheel, turning the bus onto Martin Luther King Jr. Boulevard in one smooth motion. She cruised toward campus, keeping a careful eye on the pedestrians on the sidewalk as she pulled onto one of Chapel Hill’s many narrow streets. McNair slowed to a stop at the side of the road, greeting three passengers as they got on the T bus. While many Chapel Hill residents were just then heading to work or class, Tammy was already on her second route of the day.