Nowadays, mobile Internet is available almost everywhere. Nevertheless, the impact of this "ubiquitous Web access" has not arrived at road user information systems with a few exceptions for navigation systems or traffic monitoring. Making full use of the Internet availability can enable a whole range of new services and apps for road users, helping them to make their journey safer, more comfortable, and more environmental friendly.In order to foster the wide usage of those services, a holistic framework is needed which structures and bundles potential services that could deliver data from various sources to road user information systems. SIMPLI-CITY will provide this framework.SIMPLI-CITY will facilitate two main RTD results:1. A European wide service platform allowing the creation of mobility services as well as creation of corresponding apps. This will enable third parties to create a wide range of interoperable, value-added services, and apps for drivers and other road users.2. An end user assistant allowing road users to make use of the information provided by apps and to interact with them in a non-distracting way – based on a speech recognition approach.Analogously to the "App Revolution", SIMPLI-CITY adds a "software layer" to the hardware-driven "product" mobility. SIMPLI-CITY will take advantage of the great success of mobile apps. These apps have created new opportunities and even business models by making it possible for developers to create applications on top of the mobile device infrastructure. Many of the most advanced and innovative services have been developed by new players, who bring in fresh ideas. Hence, SIMPLI-CITY will support third party developers to efficiently realise and sell their mobility-related service ideas by a range of tools and methods. For this, SIMPLI-CITY will deliver a Mobility Service Framework (including according Service and Application Marketplaces), Mobility-related Data as a Service, and the Personal Mobility Assistant, and will build example services.