The act of estimating the cognitive load 12 on the driver also preferably includes normalizing {HEAD ~ the collected factors}, weighting {TAIL ~ the normalized factors}, and summing the weighted factors 
The act of estimating the cognitive load 12 on the driver also preferably includes normalizing { HEAD ~ the collected factors } , weighting { TAIL ~ the normalized factors } , and summing the weighted factors
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH