SPEED DIFFERENCES AS CRITERIA FOR EVALUATING ROAD NETWORKS (ROAD NETWORK EVALUATION CRITERIA)

GESCHWINDIGKEITSDIFFERENZEN ALS KRITERIEN ZUR STRASSENNETZ BEURTEILUNG (STRASSENNETZ-BEURTEILUNGSKRITERIEN)

TRAFFIC CHARACTERISTICS WHICH DETERMINE INDIVIDUAL SECTIONS OF NETWORKS, I.E. JOURNEY PURPOSES, JOURNEY LENGTHS AND OPTIMUM SPEEDS, ARE TO BE ASSIGNED TO A LIMITED SECTION OF THE ROAD NETWORK, TAKING ACCOUNT OF EXISTING REGIONAL PLANNING AND ASSOCIATED TRAFFIC CONDITIONS, AND TAKING ACCOUNT OF THE DESIRED FUNCTION OF THE INDIVIDUAL ROAD SECTIONS FOR THE DEVELOPMENT OF THE REGIONAL STRUCTURE. FROM COMPARISONS OF THE OPTIMUM SPEED (INDEX OPT) WHICH IS THE OBJECTIVE FOR LEVEL OF SERVICE , AND CURRENT AVERAGE SPEED (INDEX M) (I.E. FROM THE ESTABLISHED SPEED DIFFERENCES OR SPEED RELATION) A CRITERION IS OBTAINED FOR THE EVALUATION OF ROAD NETWORKS. THIS ROAD NETWORK EVALUATION CRITERION (SNK) CAN BE RELATED TO REQUIRED INVESTMENTS I, SO THAT PRIORITIES FOR INVESTMENT CAN BE DERIVED. THE RESULTS OF THE WORK ARE EXPECTED TO PROMOTE THE PRACTICAL APPLICATION OF THE RAL-N WHICH INCLUDES A PRAGMATIC PROCEDURE FOR CONSIDERING THE "GENERAL PRINCIPLES" - IN PARTICULAR THE PRINCIPLE THAT IN ROAD NETWORK DESIGN ONE MUST PROCEED TO OBJECTIVES VIA STRUCTURAL DEVELOPMENT OF THE AREA PLANNED.