摘要: |
Recently, there has been a renewed interest in problem driving behaviors such as running traffic signals, following too closely, aggressive lane changing, driving too fast for conditions, and driving while inattentive to the driving task. However, there has been a lack of specific data necessary to identify, characterize, and categorize 'crash problem types,' which has restricted efforts directed at problem driving behaviors. In order to develop more effective countermeasures, specific problem behaviors that cause crashes, and the conditions and situational factors associated with those crashes, must be identified. The Relative Frequency of Unsafe Driving Acts in Serious Traffic Crashes program, more commonly referenced as the Unsafe Driving Acts (UDA) program, was developed to provide these essential data elements. 1.1 Program Objective The goal of this research effort was to determine the relative frequency of unsafe driving acts (UDAs) in serious crashes, to categorize these UDAs and associated situational characteristics into 'crash problem types,' and then recommend countermeasures that have the potential to substantially reduce these types of crashes. |