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