000			a
999			_c17669 _d17669
003			OSt
005			20220927135359.0
008			220927b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_918133 _aJithin Raj
245			_aEvaluation of perception and nonperception based approaches for modeling urban road level of service
250			_aVol.103(2), June
260			_aNew York _bSpringer _c2022
300			_a467-480p.
520			_aAs road-user perception has become an essential component in level of service (LOS) analyses, the current study attempts to evaluate and comprehend the urban road LOS using two approaches, perception and nonperception. The study has used percent free-flow speed (PFFS) as the service measure, similar to the existing manuals. In addition, for the realistic evaluation of both approaches and to account for the frequent signalized intersections present on the roadways, the analysis evaluated urban roads as segments with multiple intersections. The nonperception-based approach utilized speed profile data from various operating scenarios and employed the k-means clustering technique for classifying and arriving at the LOS thresholds. Whereas in the perception-based approach, responses from the travelers were collected through video laboratory sessions by showing sample video clips of urban road travel. Ordered logistic regression is implemented for modeling these responses to derive the service level thresholds. The subsequent investigation revealed that the thresholds from the nonperception approach resembled the thresholds defined in existing manuals, compared to the perception approach. The study also found that urban road travelers are more tolerant of congested conditions, evidenced by a 3% decrease in perception-based thresholds. In contrast, the perception-based thresholds for the stable and free-flow conditions were incremented by 3–6% and 10%, respectively, than the nonperception approach. This suggests that perceptions of urban road travelers do not correspond with the existing PFFS thresholds that define urban road LOS. Hence, the comparative analysis presented in this paper will contribute to the efficient evaluation and planning of urban roads by examining the perceptions of both engineers and travelers.
650		0	_94642 _aHumanities and Applied Sciences
700			_918134 _aVedagiri P.
773	0		_tJournal of the institution of engineers (India): Series A _x 2250-2149 _dSwitzerland Springer
856			_uhttps://link.springer.com/article/10.1007/s40030-021-00602-4 _yClick here
942			_2ddc _cAR