Abstract
In recent years, road accident fatalities in Nigeria have continued to be on the increase. Thus, urgent attention is needed to reduce or eliminate road accidents fatalities. To achieve this goal, the cumulative sum (Cusum) control chart scheme was designed for monitoring the road accident fatalities using the recorded occurrence of road accident fatalities in a state in the western part of Nigeria. The designed Cusum detects the period of the years when the highest occurrence of road accident fatalities occurred. These periods were observed to be festive periods such as Christmas, Easter, Eid-el- Kabir, and Eid-el-Moluod. Therefore, the festive periods of the year should be used as benchmark by road managers as periods where more attention or precaution measure should be put in place on the roads to drastically reduce or eliminate high occurrence of road accident fatalities. The designed Cusum control chart can be adapted for other states in the country and also for the larger society for detecting the periods when the rate of death as a result of road accidents was prevalent.
Highlights
The problem of deaths and injury as a result of road accidents is acknowledge to be a global phenomenon with authorities in virtually all countries of the world concerned about the growth in the number of people killed and seriously injured on their roads
The cumulative sum (Cusum) control chart scheme was designed for monitoring the road accident fatalities using the recorded occurrence of road accident fatalities in a state in the western part of Nigeria
The festive periods of the year should be used as benchmark by road managers as periods where more attention or precaution measure should be put in place on the roads to drastically reduce or eliminate high occurrence of road accident fatalities
Summary
The problem of deaths and injury as a result of road accidents is acknowledge to be a global phenomenon with authorities in virtually all countries of the world concerned about the growth in the number of people killed and seriously injured on their roads. The cumulative sum (Cusum) control chart scheme was designed for monitoring the road accident fatalities using the recorded occurrence of road accident fatalities in a state in the western part of Nigeria. The designed Cusum control chart can be adapted for other states in the country and for the larger society for detecting the time point (month) of the year when the rate of death as a result of road accidents was prevalent (high occurrence) and the cumulative trend for road accident fatalities so that appropriate actions would be taken to forestall re-occurrence. The Cusum control chart is a technique for identifying whether a real problem has arisen and provides a means of estimating the time at which the problem arose Such information assists in the identification of management changes which might have caused a problem or, alternatively, an improvement, in the attribute of interest. To determine the trend or process shift, the values of Si, 1 i m are plotted on a chart or presented in a table to detect an upward shift or a downward shift in process quality (one-sided Cusum) or in both directions (Two-sided Cusum)
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