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