A Design Method for the Roadside Clear Zone Based on Accident Simulation Analysis

Table 3

Model building.

No.	Models		R^2
a	Lower limit value (braking reaction time is 0.8 s)		0.674
b			0.919
c			0.790
d			0.587
e			0.864
f	Upper limit value (braking reaction time is 1.3 s)		0.911
g			0.857
h			0.898
i			0.593
j			0.479

Note. is the departure speed, km·h⁻¹; R refers to the horizontal curve radius, m; and presents the shoulder width, m.