Recently, Advanced Driver-assist Systems (ADASs) have attracted, demonstrating the possibility that semi-autonomous driving using state-of-the-art sensors assists the drivers with more safety, convenience, and risk avoidance than controlling the car manually. ADASs work by judging the surrounding situation with the sensor data in a vehicle, but it will be possible to carry out autonomous navigation more easily by integrating the sensor data information through communication with other vehicles. To make this ultimate goal, previous routing protocols proposed for vehicle ad-hoc network can be applied to ADASs. However, the protocols are not only very diverse, but differ in their specialized strength part depending on the aim. It is inevitable to classify the pros and cons of the protocols to the aim in order to find suitable protocols for ADASs. In this paper, we analyze these various routing protocols, and examine appropriate protocols for ADAS services.