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Article
Affiliation(s)

1. Dynatrend Construction Ltd., Bowie, MD 20720, Maryland, USA
2. Department of Transportation and Urban Infrastructure Studies, School of Engineering, Morgan State University, Baltimore, MD 21251, USA
3. Department of Transportation Engineering, Ajou University, Suwon 442-749, Korea

ABSTRACT

Highway traffic safety is an issue confronting developing countries and those of industrialized nations. Nigeria, as a developing country, has been experiencing unusually high traffic related injury and fatality rates. In order to commence combating highway safety problems in Nigeria, the first task is to identify the major contributing factors; however, Nigeria has no reliable and comprehensive database of traffic accidents and casualties. Consequently, the Delphi technique was utilized in generating the required data such as number of registered automobiles, number of licensed drivers, and annual fatality count for modeling and forecasting accident rates in Nigeria. A Bayesian network model was developed and used, with the data obtained from Delphi process, to demonstrate possible traffic safety responses to different scenarios of changes in the Nigerian socio-political culture. Although the Delphi technique and the Bayesian network model only estimate the accident and safety data, those methods can be a realistic option when those data are not available, especially for the developing countries. As a result, the major accident contributors have been identified and the top three contributors—road condition, DUI (driving under the influence) and reckless driving—are policy related. The Nigerian traffic safety outlook would improve significantly if the existing laws and policies can be enforced, even at a very moderate level.

KEYWORDS

Highway safety, Delphi technique, Bayesian network, developing countries, Nigeria.

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