(Katowice, Poland, 2014) Kravets, Vladimir V.; Kravets, Tamila V.; Bas, Kostyantyn M.; Tokar, Larisa A.
ENG: With the increase in speed of wheeled vehicles, such lead nations follow their research on determining new forms of transit curves. Transit curves proposed from the viewpoint of heuristic or criteria ideas should meet true guide path of transport vehicle at both constant and alternative speed. It is proposed to form a plan, longitudinal and cross-sectional profile of highways in junctions and turns in the form of ruled surface (Shukhov’s surface) which components are in anormal plane of true trihedr on of motion path and guide path selected as a part of spiral line covering nine variable parameters determined on required boundary conditionals imposed on the curve value too if motion models are specified. It is set as specified both location and speed of a vehicle during input/output moments within considered curved highway area. It is required to determine hodograph corresponding specified mode of the vehicle movement along the highway considered as a motion trajectory. Hodograph of vehicle movement dependingupon various modes – accelerated, decelerated, with constant speed, injunctions and turns, within straight and curved areas, while sloping and rising can be synthesized in a class of proposed spiral lines (guidepaths) corresponding to true, undisturbed trajectories of a vehicle.