Advanced cruise-assist highway systems (AHS) are systems that aim to reduce traffic accidents, enhance safety, improve transportation efficiency as well as to reduce the operational work of drivers.
According to Japans MLIT, AHS can be classified into three levels based on driving support, namely AHS- i (information), AHS- c (control) and AHS- a (automated cruise). AHS- i supports part of the information collection for driving. AHS- c supports part of the driving operation as well as the information collection. AHS- a fully supports the driving operation and the information collection, therefore, responsibility for safe driving belongs to the AHS- a system. In addition to the technological problems, issues such as the responsibilities for safe driving must be considered in order to realise AHS- a .
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