The ever-increasing emergence of novel intelligent traffic systems that aim to improve traffic flows and reduce congestion in cities is creating a growing need for assessing the readiness of cities around the world to implement such systems. Yet, no standardized method currently exists for assessing a city’s readiness for smart traffic management infrastructure. This research paper aims to develop an index, the Smart Infrastructure Readiness Index (SIRI), to assess the readiness of cities for novel traffic management schemes. For the development of the index, interviews with representatives from over 10 different EU member states were conducted to gather information on the importance of different factors that affect implementing smart traffic solutions. Analytic Hierarchy Process was then utilized to extract the priority of each factor, considering both their relative importance and their interdependencies. Findings provide a hierarchical ranking of 6 EU cities, highlighting their current state of smart infrastructure readiness.