The widening use of smartphones, high urbanization rates, and the rapid evolution of technologies are driving the expansion of real time passenger information (RTPI) systems for urban transport services. RTPI provides accurate information on actual departure and arrival times and service disruptions, enabling passengers to plan more-efficient trips. Such public information systems can also create an extra incentive for the transit agency to maintain or improve performance. The market potential for RTPI systems includes installations in existing systems as well as new infrastructure. Traditionally sold as part of a larger vehicle management system that is controlled by a chosen vendor, conventional RTPI systems are a challenging expenditure in the developing world and, given the latest technologies, the conventional systems represent an increasingly outdated model. The new technologies can allow cities to obtain more economical and more adaptable RTPI systems, and government officials should consider these new developments when designing transit projects and procurement processes.