Comparision of Transition Curves in Terms of Lateral Acceleration and Lateral Jerk
Gottam Sahithi1, Neduri Prabhanjan2, G. Swamy Yadav3, K. Poongudi4, M. Swathi Kiran5, Soni Lanka6
1Gottam Sahithi: Department of Civil Engineering, Assistant professor, SR Engineering College,
2Neduri Prabhanjan: Department of Civil Engineering Assistant Professor, SR Engineering College,
3G. Swamy Yadav: Department of Civil Engineering, Assistant Professor, SR Engineering College,
4Dr. K. Poongodi: Department of Civil Engineering, Professor, SR Engineering College.
5M. Swathi Kiran: Department of Civil Engineering, Assistant Professor, SR Engineering College,
6Soni Lanka: Computer Sciences, Faculty of Science, Universiti Brunei Darussalam.
Manuscript received on 15 April 2019 | Revised Manuscript received on 21 May 2019 | Manuscript published on 30 May 2019 | PP: 2714-2718 | Volume-8 Issue-1, May 2019 | Retrieval Number: A1337058119/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This study describes about the modification of transition curves and their suitability in Highway and Railway alignment. The development of new transition curve is useful in the design and construction of new roads and also in the repair of existing roads. Transition may refer to the change of road segment used i.e., from straight road to curved, or curved to straight or from curved to curved of different radii. After straight alignment if a circular curve is introduced suddenly, it leads to jerks and directly causes discomfort to passengers. Transition curves give smooth and gradual introduction of super elevation which avoids these problems. More over when transitions are not given due to the sudden change of curvature, velocity of the vehicle also changes which results in accidents. For the comfort and safety of passengers these curves are designed in the road geometry. The different types of transition curves are clothoid, cubic parabola, spiral, sinusoidal and bloss curve. Clothoid curves are vastly used for setting out the transition curve, they are easy to set and are further called as ideal curves. In the present study cubic spirals and quadratic spirals are studied and then they are compared to the clothoid curves in terms of lateral acceleration and lateral jerk. The cubic spiral forms the first order of approximation of the spiral in which the curvature is linearly related to the path. In this study the three curves are compared to find the differences and conclusions are given based on the results.
Keywords: Transition Curve, Clothoids, Cubic Spiral, Quadratic Spirals, Lateral Jerk, Superelevation.
Scope of the Article: Economics of Energy Harvesting Communications