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Dedicated Short Range Communication (DSRC) is increasingly being recognized as the protocol of choice for vehicle safety applications by Original Equipment Manufacturers (OEMs) and road operators. DSRC offers the ability to communicate effectively from vehicle-to-vehicle and from vehicle to infrastructure with low latency and high reliability. A wide range of applications have been conceptualized to support safety, mobility and convenience, including: cooperative collision avoidance, travel information, and electronic payment. To be effective, infrastructure-based applications require an installed-vehicle base along with infrastructure deployment, while vehicle-to-vehicle applications require significant DSRC market penetration along with some degree of infrastructure support systems. Some vehicles currently include safety applications involving forward looking radar. The radar supplies information about objects, their distances and relative speed ahead of the host vehicle.

As mainstream society rapidly enters the Information Age, network connectivity becomes a necessity for both business and personal activities. Mobile users also increasingly require network connectivity, particularly within vehicles. Wireless networks have the capabilities to provide network connectivity to mobile users, but there are a large number of existing and planned wireless networks. Each technology, and each individual network implementation of the underlying technology, have specific strengths and weaknesses. This paper identifies existing and planned wireless technologies, and analyzes their capabilities to support the requirements of the anticipated applications. The conclusions are presented in terms of the dynamic changes being experienced in applications development and wireless communications deployment.