You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: A Survey of Security Services, Attacks, and Applications for Vehicular Ad Hoc Networks (VANETs) 
Chapter Title:  Basic Overview of VANETs 
1. Abstract of Cited Paper (BIB001):  Improving safety and convenience is always the top priority in designing today’s intelligent transportation system. In this paper, we study the problem of how to manage vehicle traffic at intersections by jointly considering safety, driver’s comfort, and efficiency, in vehicular ad hoc networks. We propose a distributed intersection management protocol (DIMP), which distributedly coordinates vehicle traffic from different directions by making vehicles exchange critical driving information and adaptively react based on the information. DIMP dynamically guides vehicles to adjust their speed in a way such that both safety and driver’s comfort are satisfied. By following DIMP, vehicles can pass the intersections safely and efficiently at a comfortable speed during acceleration/deceleration. We extensively evaluate DIMP, and the evaluation results show that DIMP is both effective and efficient in managing vehicle traffic at intersections.

Literature Review:
Since 1980, the VANETs, which are ad hoc network infrastructures, grew abruptly, in which vehicles were connected through wireless communication BIB002 . Recently, VANETs are used to enhance traffic safety, improve traffic flow, reduce traffic congestion, and enhance driving experiences BIB001 . Figure 1 shows the basic model diagram of VANETs, which consists of three components such as roadside unit (RSU), onboard unit (OBU), and trusted authority (TA). First, we discuss the VANET architecture, i.e., RSU, OBU, and TA. Second, we discuss the communication methods in VANETs, which is followed by the VANET standards. Lastly, we explain the VANET characteristics.