The Christian Doppler Laboratory for Wireless Technologies for Sustainable Mobility addresses fundamental research questions arising from traffic and transportation related information technology infrastructures in the field of wireless communication. We focus on questions relating to connectivity, reliability, and availability for vehicular, cellular and short-range communications. By a tight coupling of experimental work and design, we avoid the need for simplistic assumptions on communication channel statistics. We evaluate our designs on testbeds comprising real-world wireless communication environments. Thereby, we validate the devised algorithms in-situ. Key performance indicators for such wireless technologies are the reliability, the capability to meet strict deadlines, and coverage which we aim to achieve through multiple antenna transmission and reception. Our research plan consists of three modules : Vehicular Connectivity (Module 1), Smart Tags for Sensor Nets (Module 2), and Mobile Communications Evolution (Module 3). The research in Module 1 focuses on reliable real-time wireless technologies in time-variant communication scenarios for safety related applications. In Module 2, we investigate advanced transmission techniques for low energy consumption tags and aim at increasing the robustness of transmission in industrial environments. Finally, in Module 3 we measure and optimize multiuser throughput of multi antenna transmission under delay constraints on the wireless channel and the novel inter-base station co-operative signalling. Further, we evaluate the potential gain of interference management for orthogonal frequency division multiple access (OFDMA).