Adequate and efficient visual attention to the roadway is one potential mechanism for slower response times by patients with mTBI. Healthy and experienced adult drivers utilize a strategy called timesharing to safely shift attention to and from the roadway. This strategy involves a set of saccadic eye movements toward and away from the secondary task (e.g., changing a radio station) until it is completed (Figure 1),29,30 and successful timesharing limits the duration of each glance away from the roadway to less than or equal to 2 s29,31(this translates to approximately 160 feet of distance if driving 55 mph). However, 45% of teen drivers exhibit glances greater than or equal to 2.5 s away from the roadway (a critical threshold for MVC risk), compared to only 10% of experienced drivers.32 The investigation of this question therefore requires an analysis of oculomotor performance, and specifically self-paced and reflexive saccade behaviors. This is because patients with mTBI may timeshare equally to their healthy peers, but simply exhibit slow reaction times transitioning out of the timeshare. Alternatively, a lack of control of visual saccades may potentially lead to greater inefficiency in timesharing for these patients, as precious