Research on Model Development for Freeway Safety Facilities

Table 1

Procedure of the deduction score determination of each damage.

Steps	Details
1	Collect the number of damage units for each freeway segment (one kilometer long) and the scores evaluated subjectively by the experts.
2	Get the relationship of each safety facility between number of damage and the evaluating score by linear regression.
3	Calculate the slope of the equation from Step 2 of each kind of safety facilities, which is the deduction score of each damage unit.
4	Adjust the deduction scores according to the expert opinions and get the final results.