PURPOSES : This study defines travel time reliability as a concept that explains the change in travel time that passengers can hardly predict and calculates the value of travel time reliability based on travel objectives.
METHODS : Because the reliability of passage time is difficult to estimate from actual passenger data, standard quantification measures have not been established despite various interests. In this study, the reliability of transit time was defined as the expense that passengers did not recognize in advance, such as an accidental delay caused by unforeseen circumstances. For analysis based on the individual behavior of users, the data were constructed using the optional experiment method (marginal rate of substitution method) of the stated preference survey, which has the advantage of controlling the correlation between attribute variables and maintaining the independence of the data of the study.
RESULTS : Consequently, the reliability value of travel time in mandatory-purposed traffic was almost identical to the value of travel time, and the reliability value of travel time in return and shopping/leisure, which is not mandatory during non-business-purpose traffic, is lower than the value of travel time. Comparing and analyzing with existing studies on estimating the reliability value of transit time, both work/ non-work purposes are in line with the overall research results. CONCLUSIONS : Estimating the reliability value of transit time for each purpose of passage was the first attempt, and it is meaningful to suggest a direction for quantifying and applying the reliability value of transit time along with the passage time value of this study.

ABSTRACT
1. 서론
2. 선행연구 고찰
    2.1. 통행시간 신뢰성 지표
    2.2. 통행시간 신뢰성 가치
3. 연구방법론
    3.1. 통행시간 신뢰성 가치 추정 방법론
    3.2. 통행시간 신뢰성 가치 조사 방법론
    3.3. 소결
4. 자료구축
    4.1. 조사개요
    4.2. 자료구축
    4.3. 조사설계
5. 통행목적별 통행시간 신뢰성 가치 추정
    5.1. 모형의 설정
    5.2. 추정결과 및 분석
6. 결론
REFERENCES

• 허은진(지방교육재정연구원 연구개발팀) | Heo Eun Jin 교신저자