accident rate

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accident rate

The number of accidents in a given period of time against benchmarked hours flown/takeoffs completed/passenger-miles or kilometers/stage flights. In military aviation, the term refers to the number of accidents per 100,000 flying hours. Some air forces use 10,000 h as the benchmark. In commercial aviation, this refers to the number of accidents per 100 million passenger-miles or kilometers or per 100,000 stage flights. In general aviation, it is the number of accidents per 100,000 takeoffs. The reckoning period is generally a financial year or a calendar year and, in some cases, it is a five-year moving average. Accident rates are further subclassified as human error by the aircrew, ground crew error, and material failure, in addition to write-offs (damaged beyond economical repairs) and fatal accidents.
References in periodicals archive ?
This section introduces the identification of freeway black spots using the approach of improved accident frequency at first and then describes the model development, that is, a three-stage RRM model, which promises the minimization of regret value, considering the probability of black spots.
With currently over 52,000 people working to deliver the metro Phase One, the accident frequency rate (AFR) is 0.036 which is most probably the lowest ever achieved in such a mega project."
Furthermore, the rise in accident frequency has also been associated with growing levels of distracted drivers and higher average speeds on many of the roads and highways throughout the country.
To address these problems that the linear regression model had, previous investigators suggested a Poisson regression model wherein accident frequency is translated as a discrete random variable [2].
In strong correlation with the spike in mileage (see Figure 1), accident frequency is at a 10-year high, having risen steeply in 2014 and 2015.
Sobti also said BHEL has won five ' national safety awards' for outstanding achievements in terms of the longest accident free period and lowest accident frequency rate at their works.
According to the firm, a decline in accident frequency due to safer vehicles and the adoption of autonomous vehicles would shrink the US personal auto insurance sector by 60 percent within 25 years.
Workplace accident frequency (WAF): This is the monthly number of work-related accidents, multiplied by one million man-hours exposed to risk, divided by the sum of the man-hours worked in the month in each store (regular and overtime).
Model results revealed that the degree of horizontal curvature, type of terrain, volume of heavy vehicles, and number of intersections have a proportional direct relationship with the frequency of frontal collisions, while speed limit and shoulder width decrease in relation to accident frequency. Ayati and Abbasi [12] used Negative Binomial regression (NB) and Poisson models to identify the factors that affect the occurrence and severity of traffic accidents.
Entrants will be ranked by their accident frequency rates and will also be judged on their accident-prevention activities.
Accident Frequency. Data on accidents and locations retrieved from the Shanghai Center, 110, were grouped into the following four categories.
To be considered for the "Safe Truck Fleet of the Year" award, the Crowley team was evaluated and ranked on several 2012 statistics, including the total number of miles driven, as well as the company's Federal Motor Carrier Safety Administration CSA fleet scores, accident frequency and overall OSHA rate.

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