“…The effect of mobile phone use on driving behaviour is also dependent on several exogenous and endogenous parameters. Exogenous parameters include type of road, that is, whether it is urban, rural, or motorway [6,12], speed limit [10], prevailing traffic flow [19], weather conditions [26], time of day [16], driver age [17,27], and gender [27]. Endogenous parameters include conversation complexity [5,7,13,18,28] and use mode, that is, whether it is handheld, hands-free (use of wired earphones), Bluetooth, or the speaker mode.…”