Superintendent Donna Milanovich said motorists who park in fire lanes and speed through the Moon Area School District's campus continue to be a "major concern" to school officials.
Milanovich, who in January issued a letter to parents concerning district safety, urged drivers to not pull over in non-parking lanes near district buildings.
She said traffic congestion at the district's high school and middle school campus poses a safety hazard.
"They're considered emergency parking lanes, and emergency vehicles could never get through (if vehicles are parked in those lanes)," Milanovich said. "We have to use the parking lots that are available."
The number of parking spaces available will increase at the beginning of the 2013-2014 school year, after the demolition of the former Moon Area Middle School is completed.
Demolition work began in January and is expected to be completed by August. An athletic practice field, as well as three parking lots with a total of 190 spaces, will be installed in place of the decades-old middle school, said district spokeswoman Megan Edwards.
Milanovich also said district visitors should not wander through hallways while attending school events, requesting that anyone present for a district function "remain in the event area."
"We really want to make sure our students and staff our safe," she said. "And this is to ensure we can keep the building safe at night and again during the day."