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working near rivers and water deeper than 3 meters has 
drowning risks. In order to eliminate this risk, it is necessary to 
monitor heavy sudden rainfall that can cause sudden increase of 
river level and some precautions are taken near the river. 
System finds and highlights the rivers and water resources 
which are deeper than 3m on the map, and pinpoints the 
associated risks of hazard and mitigation measures. By using the 
proposed system, managers, superintendents and workers will 
become aware of the risks; participate in H&S activities by 
taking necessary measures based on the risk ratings. 
H&S DSS Work Flow 
    
Activity 
iE AOL EN / 
Based 
Hazard Analysis 
  
Figure7. H&S DSS Work Flow 
2.4 Implementation 
Case study was focused on 17 km of a pipeline project. It was 
formed by steel pipe, has 30 meters working strip and located at 
mountainous terrain. System was developed to produce risk 
map for each activity that has been performed in pipeline 
construction such as clearing and grading, trenching, stringing 
etc. H&S regulations was used in the system for implementing 
H&S DB these are Health and Safety at Work etc Act 1974 and 
Management of Health and Safety at Work regulations 1999 
User selects the activity and enters working area beginning 
point and end point from user interface as shown on Figure8. 
  
  
Figure8. User Interface for Information Entry 
Execute the button, risk map will be shown. For example on 
this map hazard are highlighted by this system, based on the 
risk score (Figure9.). 
  
  
Figure9. User Interface Viewing the Hazards & Risk Map 
3. CONCLUSION 
This paper describes an on-going study that focuses on design 
and development of a web-based health and safety decision 
support system integrated with GIS for oil and gas pipeline 
construction projects. H&S DSS can be used for detecting 
potential hazards and risks, more importantly, as a warning sign 
for the construction activities that require immediate corrective 
action for mitigation. It allows the user access the H&S data 
efficiently for effective decision making and proactive H&S 
management. 
The proposed system provides integration of spatial and 
thematic information in a single environment. Spatial data was 
retrieved from construction layout plans and topographic maps 
of the project. Geography-related hazardous work activities and 
mitigation measures were extracted from British Health and 
Safety at Work Act and Construction (Health, Safety and 
Welfare) Regulations and formalized. This formalized H&S 
data was entered to a database in GIS and represented in several 
data layers. Once the user input is collected for non-spatial 
risks, the database was queried for potential hazards and the 
work areas that had hazard potential and safety risks were 
identified. Moreover information about mitigation measures 
was retrieved to take necessary actions for preventing 
construction accidents. Besides, pinpointing potential hazards 
and their locations at construction site it also offers mitigation 
measures. 
It is anticipated that the system can facilitate an effective H&S 
management with high level participation of employees. Since it 
is a web-based system, it enables remote access and control, 
which is important for linear projects that have a scattered 
nature. In the future, the developed H&S system can be 
integrated with construction management software. 
4. REFERENCES 
Atay, H., Ergen, E., Toz, G., 2010. GIS based decision support 
system for health and safety management in linear projects, 
Proceedings of The International Conference on Computing in 
Civil and Building Engineering, Nottingham, UK. 
Bansal V.K. and Pal M., 2005. GIS in Construction Project 
Information System. Proceedings of Map India, 8th Annual 
International Conference and Exhibition in the Field of GIS, 
GPS, Arial Photography, and Remote Sensing. New Delhi, 
India.