The act of estimating the cognitive load 12 on {TAIL ~ the driver} may alternatively include other suitable methods to combine {HEAD ~ the collected values} 
The act of estimating the cognitive load 12 on { TAIL ~ the driver } may alternatively include other suitable methods to combine { HEAD ~ the collected values }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD