The aim of this technical report is to describe the proof-of-concept of the CEN-DSRC imple- mentation of the remote interrogation function of the new version of the digital tachograph. The current digital tachograph (DT) system to monitor the driving time in commercial ve- hicles above 3.5 tons is governed by Council Regulation (EEC) No 3821/85 of 20 December 1985, which was modified at several occasions and more recently in 2006, when the digital tachograph was introduced, and in 2009, when it was updated to technical progress to avoid fraud and reduce the administrative burden. In July 2011 the Commission made a proposal (COM(2011) 451 final) to modify the tachograph regulation, which has been the object of discussions in Council and Parliament in the course of the ordinary legislative procedure. The final version of the approved regulation was published in February 2014 (Regulation 165/2014 (Commission, 2004)). The technical specifications of the smart tachograph were published as Regulation 799/2016 (Commission, 2011). One of the main functions is the remote interrogation of the Smart Tachograph (ST) installed in the commercial vehicle through the CEN-DSRC standard. The function supports law enforcers in the checking of potential frauds or malfunctions in the ST. To support the future deployment of the smart tachograph and to validate the technical specifications of the smart tachograph regarding the remote interrogation function, JRC issued a tender to the DSRC manufacturer Q-FREE to implement a prototype of the new remote interrogation systems. The prototype was successfully implemented and tested. It was shown during the JRC Open day in May 2016 to thousands of visitors at the stand of the smart tachograph organized by unit DG.JRC.E3. ; JRC.E.3-Cyber and Digital Citizens' Security