Predicting Operating Speeds at Urban Multilane Roundabouts in Abu Dhabi, United Arab Emirates

Table 3

Developed speed prediction models.

Parameter	Coefficient	-stat
Predicting entry speed:
Intercept
Entry :
Hourly traffic volume:
Proportion of heavy vehicles:
Coefficient of determination		-
Significance of statistic		-
Standard error		-
Predicting circulating speed:
Intercept
Radius of the central :
Hourly traffic volume:
Proportion of heavy vehicles:
Coefficient of determination		-
Significance of statistic		-
Standard error		-
Predicting exit speed:
Intercept
Exit :
Hourly traffic volume:
Proportion of heavy vehicles:
Coefficient of determination		-
Significance of statistic	0.000	-
Standard error	3.611	-

Figure 2 for the typical locations of the entry radius, the radius of the central island, and the exit radius.