Obstacle Emergence Risk and Road Patrol Policy

Table 1

Route data.

Route	A1 and A2	B1 and B2	C1 and C2
Route length [km]	82.6	88.3	93.6
Number of sample	3,820	3,296	4,140
Number of fallen objects	3,501	3,079	3,817
Number of average fallen objects	8.48	6.97	8.16