The 5th generation (5G) of mobile and wireless communications is expected to have a large impact on society and industry that will go far beyond the information and communications technology (ICT) field. It is expected that 5G will play a key role for the automotive sector and transportation in general, for instance allowing for advanced forms of collaborative driving and the protection of vulnerable road users, or increased efficiency in railroad transportation. This chapter elaborates in more detail on the timing of the book with respect to the 5G developments in 3rd generation partnership project (3GPP) and global initiatives. It stresses the exact scope of the 5G system design. The chapter finally explains the approach pursued in writing this book, and introduces the structure and also presents an outline of this book.