英文摘要 |
This paper aims to compare the amber-light durations determined by twoapproaches: the cumulated stopping probability (CSP) approach proposed byLin et al (1987, 1988) and the aggregated stopping possibility (ASP) approach proposed by Hsu and Lan (2003). We demonstrated with an example anddiscovered that the CSP approach worked well under single-vehicle arrivalcondition, but it overestimated the desired amber duration under multi-vehiclearrival condition; in contrast, the ASP approach worked well for bothcircumstances. We further conducted a field case study in Taipei. The resultsshow that, under various types of vehicle arrivals, the CSP approach leads todiversified cumulative stopping probability curves of desired amber durations,however the ASP approach comes out with rather consistent results. From thefield study, more red light runners (violators) are observed at the end of theamber light cycle under multi-vehicle arrival condition than single-vehiclearrival condition. Therefore, this study proposes a design of fixed length of theamber light and varied length of the red light that can be adjusted according tosuch factors as intersection width, approaching speed and vehicle arrival typesat the light change. |