Samenvatting
The method of communication between the customer and the engineer has been refined to further improve the headlight beam pattern development process. The refinements included: (1) reduction of word pairs used for semantic differential scaling; and (2) use of shortened questionnaire on night-roadway viewing zones. The present research suggests a strong relationship between the scores of the reduced word pair/zone questionnaire and the overall positive score of the longer ("short") questionnaire used in this and previous work.