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|Title:||Collection and evaluation of projected time gap using CAMDAS||Authors:||Wang, Z.
|Issue Date:||Jun-2003||Citation:||Wang, Z.,Chin, H.C.,Lim, K.B. (2003-06). Collection and evaluation of projected time gap using CAMDAS. Road and Transport Research 12 (2) : 42-53. ScholarBank@NUS Repository.||Abstract:||Time gap is by far the most widely accepted measure for drivers' gap acceptance behaviours in gap acceptance studies. Nonetheless, time gap, as conventionally measured after a vehicle clears a fixed reference line in an intersection, is sometimes inadequate in representing gap acceptance behaviours, because it is measured well after a driver's decision-making time. Projected time gap (time gap 'projected' to a fixed reference line at the instance when a driver makes the crossing or merging decision), though intuitively a better measure, is beyond the capability of conventional methods. This paper, adopting CAMDAS-a Video Image Processing (VIP) software package - presents a practical approach, which is capable of extracting the distance gaps as well as the associated major-road vehicle approach speeds, and hence the projected time gaps. The relationships between time gap, distance gap, projected time gap and the major-and minor-road vehicle speeds are also established and evaluated.||Source Title:||Road and Transport Research||URI:||http://scholarbank.nus.edu.sg/handle/10635/50676||ISSN:||10375783|
|Appears in Collections:||Staff Publications|
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