“…Our subjects slightly more often drove too fast while having a phone call. This is not consistent with numerous studies reporting lower speed of phoning drivers (Törnros & Bolling, 2005;Rakauskas, Gugerty & Ward, 2004;Knapper et al, 2015). However, this difference is caused by difference in measurement: The speed of a driver was assessed by an observer sitting in the car, while in many previous studies measurement was made by a driving simulator.…”