Bus STOP
It's 30 seconds. If stopping for 30 seconds makes you late, you should have left earlier.
https://www.penndot.gov/TravelInPA/Safety/TrafficSafetyAndDriverTopics/PublishingImages/School-Bus-Stopping.gif?fbclid=IwAR3lqL2YK_G9OO5lYOuAD6QIi0ovXkrN6ntVhLIhG-PWbA9vV14TBjKUTeA