## 4 Opportunities and Open Research Areas in VANET Multimedia
### Audio-Visual Transmission  
TIM contains various types of information such as current traffic conditions, incidents, weather conditions, and other relevant data that can affect the driver's journey. These messages are orchestrated to provide drivers with real-time traffic updates and enable them to make informed decisions about their route and driving behavior, thus improving safety and reducing travel time. However, effectively disseminating TIM while ensuring accuracy and minimizing network congestion presents significant challenges. Despite these challenges, TIM offers diverse applications, including real-time traffic updates, congestion warnings, road weather information, hazard alerts, work zone notifications, speed limit advisories, and image-enhanced notifications.  
Numerous studies have been conducted to assess the performance of Traffic Information Messages (TIMs) in Vehicle-to-Everything (V2X) communication within vehicular ad hoc networks (VANETs). TIMs can achieve high message-delivery rates and low latency, although accuracy can be influenced by factors such as communication range and signal interference. The efficient dissemination of TIM messages, while ensuring accuracy and minimizing network congestion, poses challenges in VANETs. Therefore, it is imperative to devise dissemination protocols that can effectively deliver TIM messages in a timely and reliable manner. Ensuring accuracy involves addressing factors such as the reliability of data sources, message-aggregation techniques, and the presence of signal interference.  
In a similar vein, one potential approach to enhancing TIM is to incorporate compressed images, which can be transmitted in batches, providing drivers with image-enhanced notifications. To achieve this, it is crucial to develop dissemination protocols that effectively address challenges related to network congestion and signal interference. These protocols should allow for the efficient compression of images, enabling their proper transmission within the VANET environment. Upon reception, the images can be reassembbled in the On-Board Unit (OBU), offering enhanced visual information to the drivers. Furthermore, it is essential to conduct thorough evaluations to assess the impact of TIM on overall traffic efficiency, driver behavior, and road safety. This evaluation process will further enhance the effectiveness of TIM in VANET environments, ensuring its successful integration and utilization.  
In summary, evaluating the performance of TIM in V2X communication has highlighted the importance of delivering messages accurately and efficiently. Considering the challenges posed by network congestion and signal interference, incorporating compressed images into TIM messages, transmitted in batches, presents a viable solution for enhancing TIM's capabilities. Developing dissemination protocols that address these challenges will optimize the transmission of compressed images in VANETs. Moreover, conducting comprehensive evaluations will enable a thorough assessment of TIM's impact on traffic efficiency, driver behavior, and road safety, thereby enhancing its overall effectiveness in VANET environments.