Final answer:
The code categories used to report transport accidents start with the letter 'V' as per the International Classification of Diseases (ICD).
Step-by-step explanation:
The letter that begins the code categories used to report transport accidents is 'V'. Specifically, these codes are from the International Classification of Diseases (ICD), which is a standardized tool for classifying and coding all types of diseases and a wide variety of symptoms, signs, abnormal findings, and external causes of injury or disease.
For transport accidents, the ICD uses codes that start with the letter 'V'. These codes help to specify the type of transport accident, such as car accidents, motorcycle accidents, accidents involving pedestrians, and other types of transport-related incidents. The detailed coding of transport accidents is essential for public health surveillance, insurance claims, and policymaking regarding traffic safety.
The letter 'K' in the KABCO system represents the primary collision factor, which is the first code used to describe the type of accident. It categorizes accidents into five main categories: K1 for head-on crashes, K2 for rear-end crashes, K3 for side-impact crashes, K4 for crashes involving a single vehicle, and K5 for crashes involving pedestrians or bicyclists.
Therefore, in the KABCO system, the letter 'K' begins the code categories used to report transport accidents.