MIAMI -

Miami-Dade County Public Schools Superintendent Alberto Carvalho decided to join school bus drivers as they did a dry run before school starts Monday morning.

"(The school district) runs the world's largest school bus fleet," Carvalho told Local 10 News on Thursday as he showed off the buses, complete with new air-conditioning systems and seat belts.

With more than 1,300 buses, the school district transports more than 60,000 Miami-Dade County students every school day.

Bus driver Gwendolyn Tillman said parents shouldn't worry if the bus is a few minutes late. Drivers are allowed 10 minutes when there is bad weather or traffic.

Parents can also download the new free smartphone app, complete with bus routes and student schedules.

ON THE WEB | Superintendent Alberto Carvalho on Twitter

ON THE WEB | Superintendent on Facebook

BACK TO SCHOOL | COMPLETE COVERAGE