Intelligent vehicles (IVs) are an exciting and vital topic for transportation because they can improve roadways’ operational efficiency and safety. Although these expectations may not reflect reality, we should not forget that we still have a long way to go before IVs become commonplace. Research on intelligent cars is a work in progress, where experts continuously deal with old problems and share new ones along its development path. To realise these dreams of integrating IVs into our transportation system infrastructure, it is desirable to cope with existing issues while simultaneously recognising major frontiers that need to be conquered. This paper aims to facilitate researchers’ lives by unveiling them.