Plane and Convex Mirror Sizes for Small to Large Trucks: Predictions from Truck Characteristics

摘要

An analysis was made of the relationship among Cab dimensions and other characteristics of a sample of 28 U.S. trucks and the sizes of plane and convex mirrors needed to view proposed ground and vertical FMVSS III indirect field of view targets. The purpose was to determine if (1) mirror size could be predicted from truck dimensions and (2) a few mirror sizes could be identified as providing an adequate FOV for a broad range of trucks. Truck Eye-Height above ground was found to be the best single predictor of mirror sizes and additional dimensions did not improve predictions. Scatter plots showing the relation between Eye-Height and mirror sizes are presented. Equations for selecting plane and convex mirror height and width based upon truck Eye-Height were derived. They provide a simple method for selecting necessary mirror sizes and for verification of their adequacy with regard to FMVSS III indirect FOV targets.