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model by unit of route group.” Journal of the Korean Society of Transportataion, Vol.
28, No. 1, pp. 135-142 (in Korean).Roh, C. G., Kim, W. G. and Son, B. (2010), “Development
of bus arrival time estimation model by unit of route group.” Journal of the Korean
Society of Transportataion, Vol. 28, No. 1, pp. 135-142 (in Korean).