Boston Mayor Michelle Wu is vowing to improve school bus efficiency and getting students to school on time, despite a tracking app​ that is still resulting in late arrivals to school and delays.

BPS Superintendent Mary Skipper and Mayor Michelle Wu hopped on a school bus Wednesday morning — observing the students’ everyday transportation challenge as the bus rolled into the Higginson/Lewis K-8 School six minutes past the first bell.

Boston Public Schools are dealing with frustrating transportation issues as some buses arrive an hour late to pick up students.