TABLES SHOWING PARAMETERS FOR ASYMMETRICAL S-CLOTHOIDS

THE GENERALISATION OF THE USE OF THE ASYMMETRICAL S-CLOTHOID HAS LED TO THE ESTABLISHMENT OF A TABLE OF PARAMETERS SPECIALLY ADAPTED TO THIS CASE OF HIGHWAY GEOMETRY. THIS TABLE ALLOWS THE PLANNER TO QUICKLY EVALUATE THE ELEMENTS OF THE CLOTHOID BEFORE USING A COMPUTER. EACH TABLE CORRESPONDS TO ONE OF 331 PAIRS OF THE MOST COMMON SELECTED RADII. THE RATIO OF THE RADII LIES BETWEEN 1.5 AND 5. THE TABLE SHOWS HORIZONTALLY THE VALUE OF THE DISTANCE OF THE CENTRES OF THE CIRCLES AND VERTICALLY THE VALUE OF THE PARAMETERS RATIO WHICH CAN VARY BETWEEN 1 AND 3. THE USE OF THE TABLE MAY BE EXTENDED TO AN INFINITE NUMBER OF OTHER PAIRS OF RADII.