Each year, school buses across the U.S. and Canada carry students on roughly 8 billion trips, placing them among the largest transportation networks in the world.
On any given school day, close to 484,000 school buses roll through streets across North America.
Together, those buses move approximately 26.9 million children to and from school each day, accounting for more than half of all K–12 students.
Unlike public transit, school bus systems in the U.S. and Canada operate independently, with dedicated stops, routes, and schedules built around the school day.
Purpose-built school buses are largely a North American phenomenon. In most other countries, students travel on standard public or charter buses instead.
A standard full-size school bus holds between 66 and 90 passengers, a higher capacity than many comparable vehicles.
Most school buses have a single entry door at the front, a design that differs from city buses, which typically offer multiple boarding points.
Older models relied on manual doors, while newer buses generally use air- or electrically assisted mechanisms for smoother operation.
Early bus designs posed a hazard when loose clothing could catch on handrails during exits, which led to safety-focused redesigns. The U.S. government eventually developed testing procedures to flag dangerous handrail configurations in school buses.
School buses are legally permitted to halt traffic using flashing lights and an extending stop-sign arm while students board or exit. By the mid-1940s, most U.S. states had enacted laws requiring motorists to stop for buses loading or unloading children. Today, every state and Canadian province has some version of this requirement on the books.
Outside North America, few countries grant school buses the authority to stop surrounding traffic, leaving it largely to the discretion of individual drivers.
In the U.S., school bus drivers are required to hold a commercial driver’s license, which carries stricter requirements than a standard license. They must also obtain a separate “S” endorsement specific to school bus operation. Qualification involves passing both written and behind-the-wheel exams tailored to school buses. Background screenings and sex offender registry checks are also mandatory, given the nature of the work.
Full-size school buses generally fall under the Class B vehicle classification, while smaller van-based models are categorized as Class C.
School bus yellow is a color developed specifically for North American school buses in 1939. Originally called National School Bus Chrome, it is now officially designated National School Bus Glossy Yellow in both the U.S. and Canada, with an RGB value of 245, 165, 0.
The original pigment for school bus yellow was monoclinic lead(II) chromate, commonly known as chrome yellow, which offered strong steel-protective qualities. Because of the toxicity associated with both its lead and chromate components, and due to lead sulfide’s tendency to darken when exposed to air, the pigment was later replaced by a blend of cadmium sulfide and cadmium orange or selenium-based pigments formulated to match the original color.