DOI:
https://doi.org/10.14483/23448393.19828Published:
2024-01-13Issue:
Vol. 29 No. 1 (2024): January-AprilSection:
Civil and Environmental EngineeringSafety Performance Functions for Mountain Two-lane Rural Roads in Ecuador
Funciones de Desempeño de Seguridad para Carreteras Rurales de Dos Carriles en entornos de montaña en Ecuador
Keywords:
safety performance functions, two-lane rural roads, Ecuador (en).Keywords:
funciones de desempeño de seguridad, carreteras rurales de dos carriles, Ecuador (es).Downloads
Abstract (en)
The two-lane rural road on mountainous roads has various design and operational challenges. This complexity could produce a road with specific geometric configurations or segments where the probability of a road accident increases. The Highway Safety Manual (HSM) offers a predictive model to detect such sites using Safety Performance Functions (SPF). These functions predict the number of road crashes at the different roadway elements and apply to all project phases. Many functions or equations have been developed worldwide; however, in Ecuador, they have not yet been estimated. Therefore, this study aims to propose Safety Performance Functions for two-lane rural roads in Ecuador in mountainous environments. To do this, design and operation variables were collected from 25 roads in the Ecuadorian Andes. The SPFs were developed with crash data from 2017-2019 and validated with information from 2020-2021. As a result, 12 SPFs were developed for three types of crashes (total, fatal + injury, property damage only) and various ranges of annual average daily traffic (AADT). These equations estimate the average expected frequency of accidents for existing conditions, alternatives for existing conditions, or proposed new road projects. This study will improve the road safety of the built roads and new projects.
Abstract (es)
Las carreteras rurales de dos carriles que atraviesan caminos montañosos presentan grandes desafíos de diseño y operación. Esta complejidad puede producir una carretera con ciertas configuraciones geométricas o segmentos en donde aumente la probabilidad de siniestro vial. El Manual de Seguridad de Carreteras (HSM) ofrece un modelo predictivo para detectar esos sitios utilizando de las funciones de desempeño de seguridad (SPF). Estas funciones permiten predecir el número de siniestros en diferentes elementos de la carretera y es aplicable a todas las fases de un proyecto. Existe una gran cantidad de funciones o ecuaciones que se han desarrollado a nivel mundial, sin embargo, en Ecuador aún no se han estimado. Por lo tanto, el objetivo de este estudio es proponer funciones de desempeño de seguridad para carreteras rurales de dos carriles en Ecuador en entornos montañosos. Para ello, se recolectó variables de diseño y operación de 25 carreteras en la los andes ecuatorianos. Las SPF fueron desarrolladas con los datos de siniestros del 2017-2019 y validados con los datos del 2020-2021. Como resultado, se desarrollaron 12 SPFs para 3 tipos de siniestros (total, fatal + lesiones, sólo daños materiales) y para diversos rangos de tránsito promedio diario anual (AADT). Estas ecuaciones se usan para estimar la frecuencia promedio esperada de siniestros para las condiciones existentes, para las alternativas a las condiciones existentes o las nuevos proyectos de carreteras. Este estudio permitirá mejorar la seguridad de las carreteras construidas y en nuevos proyectos.
References
AASHTO, Highway Safety Manual, First. Washington, EE. UU.: AASHTO, 2010.
AASHTO, “Highway Safety Manual,” 2016. https://www.highwaysafetymanual.org/Pages/default.aspx (accessed Jul. 26, 2022).
M. M. A. Al-Omari, M. Abdel-Aty, and Q. Cai, “Crash analysis and development of safety performance functions for Florida roads in the framework of the context classification system,” J. Safety Res., vol. 79, pp. 1-13, Dec. 2021. https://doi.org/10.1016/J.JSR.2021.08.004
M. Williamson and H. Zhou, “Develop calibration factors for crash prediction models for rural two-lane roadways in Illinois,” Procedia Soc. Behav. Sci., vol. 43, pp. 330-338, Jan. 2012. https://doi.org/10.1016/J.SBSPRO.2012.04.106
R. Srinivasan, D. Carter, and K. Bauer, “Safety performance function decision guide: SPF calibration vs SPF development (FHWA-SA-14-004),” 2013. https://rosap.ntl.bts.gov/view/dot/49504 (accessed Nov. 11, 2022).
Y. García, P. Rojas, E. Duque, and H. Rojas-Asuero, “Calibración del modelo predictivo de accidentes de tránsito del HSM en carreteras del Cantón Loja (Ecuador),” INNOVA Res. J., vol. 3, no. 7, pp. 114-123, Jul. 2018. https://doi.org/10.33890/innova.v3.n7.2018.605
R. Srinivasan and K. Bauer, “Safety performance function development guide: Developing jurisdiction-specific SPFs (FHWA-SA-14-005),” 2013. https://highways.dot.gov/safety/data-analysis-tools/rsdp/rsdp-tools/safety-performance-function-development-guide-0 (accessed Nov. 11, 2022).
K. Bauer and D. Harwood, “Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways (FHWA-HRT-13-077),” 2014. https://www.fhwa.dot.gov/publications/research/safety/13078/index.cfm (accessed Nov. 11, 2022).
T. Jonsson, C. Lyon, J. N. Ivan, S. P. Washington, I. Van Schalkwyk, and D. Lord, “Differences in the performance of safety performance functions estimated for total crash count and for crash count by crash type,” Transportation Res. Rec., vol. 2102, pp. 115-123, 2009. https://doi.org/10.3141/2102-15
B. K. Brimley, “Calibration of the highway safety manual safety performance function and development of jurisdiction-specific models for rural two-lane two-way roads in Utah,” Master’s thesis, Fulton College of Engineering and Technology, 2011. [Online]. Available: http://hdl.lib.byu.edu/1877/etd4337
L. Li, V. V. Gayah, and E. T. Donnell, “Development of regionalized SPFs for two-lane rural roads in Pennsylvania,” Accid. Anal. Prev., vol. 108, pp. 343-353, Nov. 2017. https://doi.org/10.1016/J.AAP.2017.08.035
N. J. Garber, P. R. Haas, and C. Gosse, “Safety performance functions for two-lane roads in Virginia,” presented at the Transportation Res. B. 89th Annual Meeting, Washington DC, USA, 2010. [Online]. Available: https://trid.trb.org/view/910153
P. Alluri, J. Ogle, F. Hie, K. Gladhill, K. K. Dixon, and C. M. Monsere, “Comparison of calibration factors obtained using Oregon and Georgia data to implement HSM procedures on two-way two-lane rural roads,” presented at Moving Toward Zero. 2011 ITE Tech. Conf. Exhibit, 2011. [Online]. Available: https://trid.trb.org/view/1103800
S. Y. Stapleton, A. J. Ingle, M. Chakraborty, T. J. Gates, and P. T. Savolainen, “Safety performance functions for rural two-lane county road segments,” Transportation Res. Rec., vol. 2672, no. 52, pp. 226-237, Oct. 2018. https://doi.org/10.1177/0361198118799035
L. Garach, J. de Oña, G. López, and L. Baena, “Development of safety performance functions for Spanish two-lane rural highways on flat terrain,” Accid. Anal. Prev., vol. 95, pp. 250-265, Oct. 2016. https://doi.org/10.1016/J.AAP.2016.07.021
FWHA, “Crash modification factors clearinghouse,” 2022. http://www.cmfclearinghouse.org/index.cfm (accessed Jul. 27, 2022).
G. Bahar, NAVIGATS Inc., and E. Hauer, “User’s guide to develop highway safety manual safety performance function calibration (Project 20-07/332),” 2014. https://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP20-07(332)_FinalGuide.pdf (accessed Nov. 11, 2022).
OSEVI-UTPL, “Observatorio de Seguridad Vial,” 2022. https://vinculacion.utpl.edu.ec/es/observatorios/osevi (accessed Aug. 03, 2022).
Agencia Nacional de Tránsito del Ecuador, “Estadísticas siniestros de tránsito,” 2022. https://www.ant.gob.ec/estadisticas-siniestros-de-transito-prueba/ (accessed Jul. 27, 2022).
J. M. Pardillo Mayora, R. B. Manzo, and A. C. Orive, “Refinement of accident prediction models for Spanish national network,” Transportation Res. Rec., vol. 1950, pp. 65-72, Jan. 2006. https://doi.org/10.1177/0361198106195000108
How to Cite
APA
ACM
ACS
ABNT
Chicago
Harvard
IEEE
MLA
Turabian
Vancouver
Download Citation
License
Copyright (c) 2024 Yasmany García-Ramírez
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
From the edition of the V23N3 of year 2018 forward, the Creative Commons License "Attribution-Non-Commercial - No Derivative Works " is changed to the following:
Attribution - Non-Commercial - Share the same: this license allows others to distribute, remix, retouch, and create from your work in a non-commercial way, as long as they give you credit and license their new creations under the same conditions.
2.jpg)
