Научный доклад ID 2624 : 2024/3

Knowing the different geometry of the roadways and railways is of great importance for their design and reconstruction. Horizontal alignment, vertical alignment and cross-section are the three fundamental components of roadway and railway geometry. The geometry of the roadway can be of different types–horizontal and vertical curves. The horizontal alignment of the roads consists of straight lines, transition curves, circular arcs, etc. In practice, the geometry of roadways and railways is often a combination of different types of curves used in roundabouts and railway station tracks. Horizontal curves may be reverse, spiral, circular, compound, broken back, deviation, etc. Vertical curves are used to ensure a smooth transition between the tangents of the vertical alignment of roadways and railways. In transportation civil engineering a variety of curves are used. This research presents an approach to calculating the radius of a reverse curve. In the experiment described we show the difference between the officially used formulas and those proposed by the authors. The presented solution and example prove that it is necessary to improve the normative documents in the field of transportation infrastructure. The application of these formulas to an example shows that there is a difference between the two formulas applied for the calculation of the radius of the reverse curve.