With driver fatigue accounting for 1 in 5 serious crashes, tachographs play an important role in road safety, helping to enforce commercial driver and vehicle legislation. Fitted to a vehicle they record speed, distance, and driver activity. Commercial fleet operators need to quickly calibrate and program tachographs produced by different manufacturers, fitted to numerous types of vehicles. Optimo provided a new opportunity to combine sensor and diagnostic tools with data management. The device had to be easy to hold, small enough to transport between vehicle checks, simple to use and intelligent, using automatic tachograph detection.