Back to school for Osan….Watch your speed! Published Aug. 29, 2010 OSAN AIR BASE, Republic of Korea -- Osan elementary, middle and high schools are back in session beginning the morning of Aug. 30. Those traveling along Songtan Blvd. near and around the areas of the Comissary and parking garages will likely meet increased traffic of vehicles and pedestrians making their way to and from schools. Drivers are reminded to remain vigilant and slow their speeds.