DOI:

https://doi.org/10.14483/23448393.19828

Published:

2024-01-13

Issue:

Vol. 29 No. 1 (2024): January-April

Section:

Civil and Environmental Engineering

Safety 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

Authors

Keywords:

safety performance functions, two-lane rural roads, Ecuador (en).

Keywords:

funciones de desempeño de seguridad, carreteras rurales de dos carriles, Ecuador (es).

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.

Author Biography

Yasmany García-Ramírez, Universidad Técnica Particular de Loja

Civil Engineer graduated from Universidad Técnica Particular de Loja (UTPL) in Ecuador in 2006. He obtained a Specialist’s degree in Mountain Road Engineering from Universidad Nacional de San Juan (UNSJ) in Argentina in 2009, as well as a PhD in Civil Engineering in 2014. Currently, García-Ramírez works as an associate professor at UTPL, where he imparts knowledge in subjects related to road design at both undergraduate and postgraduate levels. He also holds several leadership roles within UTPL, including the directorship of the Master's degree program in Civil Engineering with an emphasis on mountain roads.

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

García-Ramírez, Y. (2024). Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador. Ingeniería, 29(1), e19828. https://doi.org/10.14483/23448393.19828

ACM

[1]
García-Ramírez, Y. 2024. Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador. Ingeniería. 29, 1 (Jan. 2024), e19828. DOI:https://doi.org/10.14483/23448393.19828.

ACS

(1)
García-Ramírez, Y. Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador. Ing. 2024, 29, e19828.

ABNT

GARCÍA-RAMÍREZ, Yasmany. Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador. Ingeniería, [S. l.], v. 29, n. 1, p. e19828, 2024. DOI: 10.14483/23448393.19828. Disponível em: https://revistas.udistrital.edu.co/index.php/reving/article/view/19828. Acesso em: 23 feb. 2024.

Chicago

García-Ramírez, Yasmany. 2024. “Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador”. Ingeniería 29 (1):e19828. https://doi.org/10.14483/23448393.19828.

Harvard

García-Ramírez, Y. (2024) “Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador”, Ingeniería, 29(1), p. e19828. doi: 10.14483/23448393.19828.

IEEE

[1]
Y. García-Ramírez, “Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador”, Ing., vol. 29, no. 1, p. e19828, Jan. 2024.

MLA

García-Ramírez, Yasmany. “Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador”. Ingeniería, vol. 29, no. 1, Jan. 2024, p. e19828, doi:10.14483/23448393.19828.

Turabian

García-Ramírez, Yasmany. “Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador”. Ingeniería 29, no. 1 (January 13, 2024): e19828. Accessed February 23, 2024. https://revistas.udistrital.edu.co/index.php/reving/article/view/19828.

Vancouver

1.
García-Ramírez Y. Safety Performance Functions for Mountain Two-lane Rural Roads in Ecuador. Ing. [Internet]. 2024 Jan. 13 [cited 2024 Feb. 23];29(1):e19828. Available from: https://revistas.udistrital.edu.co/index.php/reving/article/view/19828

Download Citation

Visitas

3

Dimensions


PlumX


Downloads

Download data is not yet available.
Loading...