Grade impact investigation during stopping sight distance determination on 3D road environment
Article Sidebar
-
Stopping Sight Distance, Grade, 3D Road Environment , Grade 3D Road Environment
Abstract
In the present research, Stopping Sight Distance (SSD) adequacy is assessed through a three-dimensional approach, which associates road visibility in terms of grade effect. SSD adequacy is controlled through the difference between the available and the required SSD. The research is focused on a right turned, two lane rural road, associated with a crest vertical curve for a given speed value. The road design is in accordance with the Greek Road Design Guidelines (OMOE-X, 2001) by utilizing the control design parameters for a design speed of 80 km/h and a wide range of grade values, where the vertex point of the crest vertical curve is positioned at fixed points along the road axis. The investigation is based on a vehicle speed exceeding the design speed by 20 km/h. In total 1874 cases of compound alignments were examined and the results revealed that the available sight distance is decreasing while grade increases. The vehicle speed on the tangent sections was proved unacceptable in terms of providing SSD adequacy. However, it was found that SSD adequacy is granted when the vertical vertex falls inside the circular arc of the curve’s horizontal alignment, while the optimum area is defined shortly before the horizontal vertex point.
Full text article
References
DiVito, M., & Cantisani, G. (2010). D.I.T.S.: A software for sight distance verification and optical defectiveness recognition. In 4th International Symposium on Highway Geometric Design TRB, Valencia Spain.
FGSV-Forschungsgesellschaft für Straßen- und Verkehrswesen. (2008). Hinweise zur Visualisierung von Entwürfen für außerörtliche Straßen. FGSV, Köln: H ViSt.
García, A. (2004). Optimal vertical alignment analysis for highway design – discussion. Journal of Transportation Engineering, 130(1), 138.
Hassan, Y., Easa, S. M., & Abd El Halim, A. O. (1996). Analytical model for sight distance analysis on three-dimensional highway alignments. Transportation Research Record, 1523(1), 1-10.
Ismail, K., & Sayed, T. (2007). New algorithm for calculating 3D available sight distance. Journal of Transportation Engineering, 133(10), 572-581.
Krempel, G. (1965). Experimenteller Beitrag zu Untersuchungen an Kraftfahrzeugreifen. Dissertation. TU Karlsruhe.
Mavromatis, S., Palaskas, S., & Psarianos, B. (2012). Continuous three-dimensional Stopping Sight Distance control on crest vertical curves. Advances in Transportation Studies, (29).17-30.
Ministerio de Fomento, (2000). “Trazado” Instrucción de Carreteras Norma 3.1 – IC. Madrid, Spain.
Ministry of Environment, Regional Planning and Public Works. (2001). Guidelines for the Design of Road Projects (OMOE-X). Alignment, Part 3, Greece.
Moreno Chou, A. T., Pérez, V. M. F., García, A. G., & Rojas, M. A. R. (2010). Optimal 3D coordination to maximize the available stopping sight distance in two-lane roads. In 4th International Symposium on Highway Geometric Design Polytechnic University of Valencia Transportation Research Board.
NTUA - National Technical University of Athens. (2012). H12 - Road Design Software, NTUA, Athens, Greece.
Romero, M. A., & García, A. (2007, January). Optimal overlapping of horizontal and vertical curves maximizing sight distance by genetic algorithms. In The 86th Annual Meeting of the Transportation Research Board. Washington, DC.
Sanchez, E. (1994). Three-dimensional analysis of sight distance on interchange connectors. Transportation Research Record, 1445, 101–108.
Yan, X., Radwan, E., Zhang, F., & Parker, J. C. (2008). Evaluation of dynamic passing sight distance problem using a finite-element model. Journal of Transportation Engineering, 134(6), 225-235.
Zimmermann, M., & Roos, R. (2005). Increased safety resulting from quantitative evaluation of sight distances and visibility conditions of two-lane rural roads. In 3rd International Symposium on Highway Geometric Design Transportation Research Board American Association of State Highway and Transportation Officials (AASHTO) Federal Highway Administration American Society of Civil Engineers Association Mondiale de la Route International Road Federation Institute of Transportation Engineers (ITE) National Association of County Engineers Transportation Association of Canada (TAC) Chicago Department of Transportation Illinois Department of Transportation Illinois State Toll Highway Authority.
Authors
Authors retain copyright and grant the journal right of first publication, with the work simultaneously licensed under a CC BY 4.0 License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Article Details
