| Summary |
Huei-Jr Huang ，2007.02
Graduate Institute of Traffic and Transportation Engineering and Management
Feng Chia University
There might be some unavoidable roadway hazards resulted from impropriate road design and under road construction, such as inadequate roadway containment (i.e. land barriers), off-road obstacles (e.g. sign posts) on-road hazards (e.g. unanchored road cover-plates), improper signage ends of rigid barriers, utility poles and bridge supports. Once vehicle impacts the roadway hazards, it always causes serious injury and damage both to passengers and vehicle. According to this, the roadway authority in Taiwan is starting to install crash cushion system on the obstacles to prevent serious accidents caused by vehicle striking a fixed object.
During a crash, the boxes burst one by one, serving as a series of cushions to absorb the energy of collision, thus minimizing the force exerted on the vehicle. As a result, it is necessary to install crash cushion on roadway hazards; however, it is not so easy to find a relevant research report about beneficial result of installing crash cushion system. For this reason, this research report is about installation beneficial result of crash cushion system.
Besides using benefit-cost method to seek the benefit, this research also classifies relevant research approaches as the basic searching mode. There are still a lot of problems which are not easy to solve after analyzing in the basic mode. On practical application, the ratio of benefit-cost is easily to be over-high. As a result, it constructs out this researching mode after improving the basic mode and utilizes relevant cases to carry on the mode verifying to prove the feasibility of the research approach.
Then, I made a investigation and analysis on crash cushion systems that are installed on Zhongtou highway . In addition, I also acquired year 2004 and 2005 vehicle crash data on Zhongtou highway; and utilized this research mode to get the beneficial result. |
