ar X iv :0 71 0. 12 74 v1 [p hy si cs .so c- ph ] 5 O ct 20 07 Gravity model in the Korean highway Woo-Sung Jung, ? Fengzhong Wang, and H. Eugene Stanley Center for Polymer Studies and Department of Physics, Boston University, Boston, MA 02215, USA (Dated: February 2, 2008) Abstract We investigate the tra?c ?ows of the Korean highway system, which contains both public and private transportation in