* Reduced decision-making time: Choosing an outfit can take time in the morning. Uniforms eliminate this, potentially saving a few minutes. This effect is likely small for most students.
* Less potential for conflict: Arguments over clothing choices between students and parents can sometimes delay the morning routine. Uniforms prevent this. Again, the time saved is likely minimal for most.
In short, while uniforms might shave off a few minutes from some students' morning routine, the impact on overall commute time is negligible. The time saved is far outweighed by the actual travel time to school.