| Title |
Factor Analysis on Psychological Cause of Speed Reduction in Expressway Tunnel Section Utilizing Importance-Performance Analysis (IPA) |
| Keywords |
speed reduction;psychological cause;expressway tunnel section;IPA (Importance-Performance Analysis);속도감소;심리적요인;고속도로 터널구간;중요도-만족도 분석 |
| Abstract |
Tunnel sections on the highway are different from rest of sections on the highway in terms of velocity, the number of passing cars, and vehicle density which, in particular, affect drivers" behavior before and after drivers pass through the tunnel. However, literature review reveals that former studies are too focused on quantitative indicator to consider qualitative aspects. Therefore, this paper conducts survey questionnaire and IPA (Importance Performance Analysis) to find out qualitative improvements on velocity drop on the tunnel sections. The results show as follows: First, drivers require improvements of tunnel form (length and curved form inside tunnel) which is derived from long distance tunnel. Second, experts primarily ask for amendment of geometric characteristics. With comparison of requirements of both drivers and experts, there are many differences in length of tunnel and form of curved tunnel. This also presents that drivers don"t satisfy with both length of tunnel and form of curved tunnel that are provided as a part of highway design factors. |