GRADE-SEPARATED JUNCTIONS ON TWO-LANE RURAL ROADS

PLANFREIE KNOTEN AN ZWEISPURIGEN LANDSTRASSEN

IN RECENT YEARS A NUMBER OF GRADE-SEPARATED JUNCTIONS HAVE BEEN CONSTRUCTED ON SEVERAL TWO-LANE RURAL ROADS. IT IS OFTEN STATED THAT THIS TYPE OF CONSTRUCTION HAS A CERTAIN NUMBER OF DISADVANTAGES IN RESPECT OF TRAFFIC FLOW, SAFETY AND ECONOMY COMPARED WITH THE ONLY PARTIALLY GRADE- SEPARATED TYPE IV OF RAL-K, AND THAT IT CANNOT THEREFORE BE REGARDED AS A SUITABLE SOLUTION. THE SUITABILITY OF GRADE-SEPARATED JUNCTIONS ON TWO-LANE ROADS WILL BE ASSESSED. WITH THE AID OF SPEED MEASUREMENTS, ACCIDENT ANALYSES, CALCULATIONS OF CAPACITIES AND ECONOMIC FACTORS. IF THE ANSWER TO THIS QUESTION IS POSITIVE, CRITERIA FOR APPLICATION, SUITABLE DRAFT ELEMENTS AND RECOMMENDATIONS FOR THE 2ND SECTION OF RAL-K (GRADE-SEPARATED JUNCTIONS) WILL BE ESTABLISHED.