1971•Highway Research RecordRequires access
ALIGNMENT COORDINATION IN HIGHWAY DESIGN
Bob L Smith, E E Yotter, Justin Murphy
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Abstract
THE PURPOSE WAS TO STUDY THE COORDINATION OF HORIZONTAL AND VERTICAL ELEMENTS OF HIGHWAY ALIGNMENT IN ORDER TO PROVIDE SOME DEFINITIVE GUIDELINES FOR THE HIGHWAY DESIGNER. THE TECHNIQUE OF PLOTTER-DRAWN PERSPECTIVES WAS USED IN THIS STUDY. A BATTERY OF COMPUTER PROGRAMS WAS DEVELOPED THAT PROVIDED A MEANS OF RAPIDLY AND ECONOMICALLY PRODUCING PERSPECTIVE DRAWINGS OF A PROPOSED OR EXISTING ROADWAY. THE PROGRAMS PROVIDED FOR THE COMPUTATION OF HIGHWAY ALIGNMENT AND SPACE COORDINATES, THE PERSPECTIVE PICTURE PLANE COORDINATES, AND A PLOT PROGRAM, ALL WITH THE OBSERVER (EYE LOCATION) AT ANY ARBITRARILY SELECTED LOCATION. THE CAPABILITIES OF THE COMPUTER PROGRAM ARE DESCRIBED IN DETAIL. A LARGE NUMBER OF PERSPECTIVE DRAWINGS WERE MADE FOR A DETAILED STUDY OF THE COORDINATION OF VERTICAL AND HORIZONTAL CURVES AS WELL AS FOR THE STUDY OF THE VISUAL APPEARANCE OF SPIRAL CURVES. /AUTHOR/