Bus Travel Time Deviation Analysis Using Automatic Vehicle Location Data and Structural Equation Modeling

Table 3

Path coefficients for original and modified SEM models.

Hypothesized paths	Original model		Modified Model A		Modified Model B
	CR		CR		CR
H1: dwell time → travel time deviation	6.693		3.368		3.419
H2: number of traffic signals → travel time deviation	3.397		3.028	0.002	3.053	0.002
H3: number of access connections → travel time deviation	−1.183	0.237	−2.255	0.024	−2.352	0.019
H4: departure delay → dwell time	−0.402	0.688	na	na	na	na
H5: segment length → number of traffic signals	11.132		12.054		16.534
H6: segment length → number of access connections	4.839		4.370		4.472
H7: accumulated delay → travel time deviation	−1.737	0.082	−1.813	0.07	−1.885	0.059
H8: departure delay → travel time deviation	−2.563	0.01	−3.410		−3.483
H9: departure delay → accumulated delay	−10.471		−12.560		−12.432
H10: segment length → travel time deviation	−3.882		−3.577		−3.694
H11: completed trip → travel time deviation	1.062	0.288	0.839	0.401	na	na

Note: denotes that value < 0.001. “na” denotes “not applicable.”