This article presents an important part of the DRIVE-SMILER project which is the evaluation of the feasibility of an anti-collision radar for road vehicles. In a first step, the main specifications of the radar are drawn from a bibliographic survey. Then the feasibility study is summarized:​ several mock-ups, realized by the partners, are presented. Finally, a new possibility of radar front end integration is described, which is using the quasioptical technique on active antennas. This technology, compatible with MMIC process in millimeter-wave applications, allows to suppress all the microwave links needed in the classical integration concept, in order to reduce the cost and the complexity of the radar front end.