Table 2 Variables in the Fuzzy Logic Model,,
,Variable,Fuzzy set
Input,Vehicle type,Small
,,Medium
,,Big
,,Very big
,Location,At node
,,Close to node
,,Far from node
,Time,Night
,,Early morning
,,Morning
,,Afternoon
,,Afternoon peak time
,,Evening
,Report mechanism,ETS used
,,No ETS used
Output,Duration,Very short
,,Short
,,Medium
,,Long
,,Very long
Key: ETS = emergency telephone service.,,