Terms Glossary A Advanced cruise-assist highway systems
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Advanced cruise-assist highway systems (AHS)

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.
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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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