While weather conditions can affect driving conditions, they are not a primary factor directly causing accidents. The main factors are driver impairment, vehicle defects, and road conditions.

The primary objective of accident investigation is to determine the sequence of events leading to the accident and identify the factors that contributed to it.

Rollover accidents are not as common as the other types mentioned, which are more frequent in everyday traffic situations.

Accident black spot is the term used to describe a location where a higher than average number of accidents occur.

Fatigue is not a common cause of driver impairment compared to the other options, which are more directly related to driver behavior and choices.

Accident analysis is the term used to describe the process of examining traffic accident data to gain insights into the causes and patterns of accidents.

Road widening is not a common traffic safety improvement strategy as it can sometimes lead to increased traffic speeds and potential safety risks.

Safety audit is the term used to describe the process of systematically evaluating the safety of a road or traffic system.

Sideswipe accidents are not common types of accidents involving pedestrians, as they typically occur between vehicles.

Accident data collection is the term used to describe the process of gathering information about traffic accidents.

Bicycle-train collisions are not as common as the other types of accidents mentioned, which are more frequent in urban and suburban areas.

Safety project prioritization is the term used to describe the process of ranking and selecting traffic safety improvement projects based on their potential impact and cost-effectiveness.

Motorcycle-train collisions are not as common as the other types of accidents mentioned, which are more frequent in urban and suburban areas.

Traffic safety management is the term used to describe the comprehensive approach to reducing traffic accidents and improving road safety.