A 3-tiered bus system is a transportation system commonly used in K-12 education to efficiently transport students to and from school. It involves dividing the bus routes into three distinct tiers (elementary, middle, and high) based on the geographical location of students' homes and their corresponding schools. Here's a brief overview of each tier.

The purpose of implementing a 3-tiered bus system is to optimize the use of transportation resources, reduce travel times, and minimize the number of buses needed. By categorizing students into different tiers based on their grade levels and proximity to their schools, the bus system can efficiently allocate buses and drivers to serve multiple schools within a given time frame. This helps to streamline the transportation process and ensure that students arrive at school and return home in a timely and organized manner.