a case study in Khon Kaen, Thailand Wichuda Kowtanapanich creator Yordphol Tanaboriboon Chairperson Pannapa Herabat Examination Committee Takahashi, Kiyoshi Examination Committee Park, Dong Joo Examination Committee The Royal Thai Government/ Human Resource Development Program (Phase II) Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 2001 continuing eng 100 leaves This study presents the development of GIS based computer package to determine the shortest possible routes of the emergency vehicles in Khon Kaen. In addition, the developed package also contains the database system to assist the dispatcher to easily locate the accident site. Landmarks and street networks as well as intersection names are incorporated into the developed digital map of Khon Kaen. The developed package can be used as a decision support tools. It has capability to locate accident site, calculates the shortest possible route, displays the travel direction and information including the accessibility for updating road networks status such as temporary closure of street and re-opening, etc. Furthermore, this package used GIS capabilities to achieve the optimum results, but did not require its users to be familiar with GIS software, instead, it provided a customized graphical interface. Package performance is validated by two validation tests and it was found that the developed package is suitable to determine the shortest ambulance routes in Khon Kaen. A research submitted for the partial fulfillment of requirements for the degree of Master of Engineering, School of Civil Engineering Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2001 Ambulance service Thailand Khon Kaen Geographic information systems Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B07647 http://203.159.5.9/ait-thesis/detail.php?q=B07647 170701 20260818090410.0