Table 1. Results of Tukey post hoc tests for multiple comparisons of ND means for the different road construction phases.

Comparison	Estimate	Std. Error	z value	Pr(>|z|)
Before-During	0.055	0.010	5.245	<0.001
Before-After	0.078	0.013	6.144	<0.001
During-After	0.023	0.008	2.872	<0.01