Those traffic jams are caused by pickup lines outside of schools.
duPont Manual High School and Noe Middle School students placed 14th at the 2023 American Rocketry Challenge Finals.
The district didn't elaborate on what the emergencies were, if the students were taken to the hospital, or what condition they're in.
Students at several Louisville schools have staged similar protests.
Police aren't saying what may have led to the tragedy, but family members said they never saw it coming.
Several Jefferson County Public Schools (JCPS) received threats, none of which were credible, this week.
Police said the crimes happened between Aug. 2012 and May 2022 with one victim who is under 16 years old, and another victim under 18 years old.
The JCPS Police Department is investigating and mental health providers were available at the school for students to talk to about the situation.