Do Expressway Interchanges Increase Crash Injury Severities? Insights Using Temporal Instability and Unobserved Heterogeneity

Table 6

Probability difference between different years based on the NIAC model.

Prediction year; Base year	NIAC
	2018			2019
	No injury	Minor injury	Severe injury	No injury	Minor injury	Severe injury
2017	0.0385	−0.0124	−0.0261	0.0181	0.0097	−0.0278
2018	—	—	—	−0.0156	0.0102	0.0054