You are driving on a two-lane road. A school bus with flashing red lights is stopped ahead. What must you do?

In New Hampshire, if a school bus has stopped with its red lights flashing, vehicles traveling in either direction must stop at least 25 feet from the bus. They must remain stopped until the flashing red lights have been switched off or the bus has resumed its motion. [School Bus, Part Five - Rules of the Road, State of New Hampshire Driver's Manual]