Journal Search Engine
The Journal of The Korea Institute of Intelligent Transport Systems Vol.10 No.6 pp.63-73
UTIS 구간통행속도 결측치 보정모델
Imputation Model for Link Travel Speed Measurement Using UTIS
Abstract
Travel speed is an important parameter for measuring road traffic. UTIS(Urban Traffic Information System) was developed as a mobile detector for measuring link travel speeds in South Korea. After investigation, we founded that UTIS includes some missing data caused by the lack of probe vehicles on road segments, system failures and etc. Imputation is the practice of filling in missing data with estimated values. In this paper, we suggests a new model for imputing missing data to provide accurate link travel speeds to the public. In the field test, new model showed the travel speed measuring accuracy of 93.6%. Therefore, it can be concluded that the proposed model significantly improves travel speed measuring accuracy.
