Application of Fuzzy Linguistic Rating and Entropy-Based GRA to Address Uncertainty in Safety Performance Index Construction

Table 4

The survey questionnaire.

Survey questions	Mark
Driving above the speed limit
How often do you drive over the speed limit?
[On main roads]	V1
[On regional roads]	V2
[On local/urban roads]	V3
Do you exceed the prescribed speed on roads with higher permitted speeds (60–80 km/h)?
[By more than 30 km/h]	V4
[By less than 30 km/h]	V5
Do you exceed the prescribed speed on roads with lower permitted speeds (50–60 km/h)?
[By more than 20 km/h]	V6
[By less than 20 km/h]	V7
Do you exceed the prescribed speed on local/urban roads?
[By more than 10 km/h]	V8
[By less than 10 km/h]	V9
Driving under the influence of alcohol
Do you drive under the influence of alcohol?
[On main roads]	A1
[On regional roads]	A2
[On local/urban roads]	A3
Wearing the seatbelt
How often do you wear your seatbelt while driving?
[On main roads]	P1
[On regional roads]	P2
[On local/urban roads]	P3
How often your front passenger is wearing a seatbelt while driving?
[On main roads]	P4
[On regional roads]	P5
[On local/urban roads]	P6
Do you use the child resistant system for children under the age of 5?
[On main roads]	P7
[On regional roads]	P8
[On local/urban roads]	P9
Using mobile phone while driving
Do you use a hands-free device to talk to a mobile phone while driving?
[On main or regional roads]	T1
[On local/urban roads]	T2
Do you use a mobile phone while driving to write messages and visit social networks?
[On main or regional roads]	T3
[On local/urban roads]	T4