A Washington school bus pulls completely off the roadway to load students. Which statement correctly distinguishes the required warning devices from a traveled-roadway stop?

1. Off-roadway loading uses simultaneously flashing amber hazard lamps; traveled-roadway loading uses the stop sign and alternately flashing red lamps
2. Both locations require only high beams
3. Off-roadway loading requires red lamps and the stop sign; traveled-roadway loading requires no lamps
4. The driver chooses any lamp pattern based on preference