Mobile devices offer the possibility to not install with offline data transmission, but have the limit of making the driver bring regularly the device into a fixed point for data transfer [4]. This solution, although not expensive, has not been so much deployed. An alternative is that of mobile devices with online data transmission, mainly by the use of Smartphones [4]. In this chapter, we aim to compare fixed and mobile devices with online data transmission, since they are the most easy to be accepted by drivers.