Which lanes should stop for the school bus on a four-lane undivided highway?

• Both lanes going in the direction of the school bus.
• Both lanes going in the opposite direction of the school bus.
• On a four-lane undivided highway, all four lanes must stop for a school bus.
  Explanation:

  "

  On a four-lane undivided highway, vehicles in all lanes must stop when a school bus has its red lights flashing and the "STOP" sign extended. This rule ensures the safety of children boarding or exiting the bus, as they may need to cross multiple lanes of traffic.

  "
• On a four-lane undivided highway, not a single lane needs to stop for the school bus.