| Issue |
EPL
Volume 81, Number 4, February 2008
|
|
|---|---|---|
| Article Number | 48005 | |
| Number of page(s) | 6 | |
| Section | Interdisciplinary Physics and Related Areas of Science and Technology | |
| DOI | https://doi.org/10.1209/0295-5075/81/48005 | |
| Published online | 21 January 2008 | |
Gravity model in the Korean highway
Center for Polymer Studies and Department of Physics, Boston University - Boston, MA 02215, USA
Received:
4
October
2007
Accepted:
20
December
2007
We investigate the traffic flows of the Korean highway system, which contains both public and private transportation information. We find that the traffic flow Tij between city i and j forms a gravity model, the metaphor of physical gravity as described in Newton's law of gravity, 
, where Pi represents the population of city i and rij the distance between cities i and j. It is also shown that the highway network has a heavy tail even though the road network is a rather uniform and homogeneous one. Compared to the highway network, air and public ground transportation establish inhomogeneous systems and have power law behaviors.
PACS: 89.75.Hc – Networks and genealogical trees / 89.40.Bb – Land transportation / 89.75.-k – Complex systems
© EPLA, 2008
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