Balancing Environmental and Economic Considerations in Horizontal Alignment Optimization of a Ring Road near Anzali International Wetland

Document Type : Research Article


Department of Civil Engineering, Payame Noor University (PNU), Tehran, Iran


Roads are the primary transportation infrastructure of every country and play a crucial role in achieving sustainable economic development. Neglecting environmental considerations in civil engineering projects, especially in the design and construction of roads, can cause extensive damage to human societies and ecosystems. One of the most critical issues in road design is selecting an optimal alignment that minimizes changes to land use, preserves wetlands, forests, and agricultural land, and provides a platform for sustainable development. This decision has a significant impact on the execution, operation, and maintenance costs of the route, as well as its surrounding geography. This research examines the optimal horizontal alignment between two desired starting and ending points, taking into account environmental factors, construction cost parameters, and safety indices in the Anzali ringroad highway area. The route design data was collected and the important variables affecting the route design were determined. Then, the optimal balance was evaluated using the genetic algorithm method. After analyzing the generated data, we propose the optimal horizontal alignment as the final recommended option, with four horizontal arcs and a length of 14.991 kilometers. This alignment is compatible with the environment and has significantly lower greenhouse gas emissions, resulting in a cost savings of 3.7 million dollars compared to the initial alignment. It is a desirable and shorter horizontal alignment between two points in one of the important areas of the Ramsar International Convention (Anzali).


Main Subjects

Abbasi, E., Hosseini, S. A. O., Abdi, E., and Najafi, A. (2022). Environmental Impact Assessment of Forest Roads using the Goecybernetic Assessment Matrix (GAM): A case study from the Kheyrud forest, Iran. Iranian Journal of forest, 13(5), 1-15.
Aldagheiri, M. (2009). The role of the transport road network in the economic development of Saudi Arabia. WIT Transactions on the Built Environment, 107, 275-286.
American Association of State Highway and Transportation Officials. (1994). Standard Specifications for Transportation Materials and Methods of Sampling and Testing (23rd ed.). American Association of State Highway and Transportation Officials. Washington DC.
American Association of State Highway and Transportation Officials (2011). A Policy on Geometric Design of Highways and Streets (6th ed.). American Association of State Highway and Transportation Officials. Washington DC.
Badamfirooz, J., and Mousazadeh, R. (2019). Quantitative assessment of land use/land cover changes on the value of ecosystem services in the coastal landscape of Anzali International Wetland. Environmental Monitoring and Assessment, 191(11), 694.
BagherzadehKouhbanani, M., Ramezani Mehrian, M., and Padash, A. (2022). The Progressive Trail of Environmental-Concerned Urban Planning from Growth to Resilience; an Analytical Overview. Environmental Energy and Economic Research, 6(2), 1-15.
Barisa, A., and Rosa, M. (2018). A system dynamics model for CO2 emission mitigation policy design in road transport sector. Energy Procedia, 147, 419-427.
Biancardo, S. A., Avella, F., Di Lisa, E., Chen, X., Abbondati, F., and Dell’Acqua, G. (2021). Multiobjective Railway Alignment Optimization Using Ballastless Track and Reduced Cross-Section in Tunnel. Sustainability, 13(19), 10672.
Cantisani, G., Panesso, J. D. C., Del Serrone, G., Di Mascio, P., Gentile, G., Loprencipe, G., and Moretti, L. (2022). Re-design of a road node with 7D BIM: Geometrical, environmental and microsimulation approaches to implement a benefit-cost analysis between alternatives. Automation in Construction, 135, 104133.
Casal, G., Santamarina, D., and Vázquez-Méndez, M. E. (2017). Optimization of horizontal alignment geometry in road design and reconstruction. Transportation Research Part C: Emerging Technologies, 74, 261-274.
Chai, C., Zhang, B., Li, Y., Niu, W., Zheng, W., Kong, X., et al. (2023). A new multi-dimensional framework considering environmental impacts to assess green development level of cultivated land during 1990 to 2018 in China. Environmental Impact Assessment Review, 98, 106927.
Han, C., Han, T., Ma, T., Tong, Z., Wang, S., and Hei, T. (2023). End-to-end BIM-based optimization for dual-objective road alignment design with driving safety and construction cost efficiency. Automation in Construction, 151, 104884.
Inti, S., and Kumar, S. A. (2021). Sustainable road design through multi-objective optimization: A case study in Northeast India. Transportation research part D: transport and environment, 91, 102594.
Jiang, F., Ma, L., Broyd, T., Chen, K., Luo, H., and Pei, Y. (2022). Sustainable road alignment planning in the built environment based on the MCDM-GIS method. Sustainable Cities and Society, 87, 104246.
Jiang, F., Ma, L., Broyd, T., Li, J., Jia, J., and Luo, H. (2023). Systematic framework for sustainable urban road alignment planning. Transportation Research Part D: Transport and Environment, 120, 103796.
Karimipour, H., Tam, V. Y., Le, K. N., and Burnie, H. (2021). Routing on-road heavy vehicles for alleviating greenhouse gas emissions. Cleaner Engineering and Technology, 5, 100325.
Kazancoglu, Y., Ozbiltekin-Pala, M., and Ozkan-Ozen, Y. D. (2021). Prediction and evaluation of greenhouse gas emissions for sustainable road transport within Europe. Sustainable Cities and Society, 70, 102924.
Leroutier, A., and Quirion, P. (2022). Air pollution and CO2 from daily mobility: Who emits and Why? Evidence from Paris. Energy Economics, 109, 105941.
Meng, M. R., Xi, C., Feng, Z., and Cao, S. J. (2022). Environmental co-benefits of urban design to mitigate urban heat island and PM2. 5 pollution: Considering prevailing wind’s effects. Indoor and Built Environment, 31(7), 1787-1805.
Moussa, R. R. (2022). Reducing carbon emissions in Egyptian roads through improving the streets quality. Environment, Development and Sustainability, 1-22.
Nodoushan, H. J., Padash, A., and Nadoushan, A. J. (2022). Modeling of Industrial Strategy Based on Sustainable Development Approaches. International Journal of Environmental Research, 16(3), 32.
Padash, A. (2017). Modeling of environmental impact assessment based on RIAM and TOPSIS for desalination and operating units. Environmental Energy and Economic Research, 1(1), 75-88.
Selleri, T., Melas, A. D., Joshi, A., Manara, D., Perujo, A., and Suarez-Bertoa, R. (2021). An overview of lean exhaust denox aftertreatment technologies and nox emission regulations in the european union. Catalysts, 11(3), 404.
Song, T., Schonfeld, P., and Pu, H. (2023). A Review of Alignment Optimization Research for Roads, Railways and Rail Transit Lines. IEEE Transactions on Intelligent Transportation Systems.
Tumlin, J. (2012). Sustainable transportation planning: tools for creating vibrant, healthy, and resilient communities (Vol. 16). John Wiley & Sons.
Tunno, B. J., Dalton, R., Michanowicz, D. R., Shmool, J. L., Kinnee, E., Tripathy, S., et al. (2016). Spatial patterning in PM2. 5 constituents under an inversion-focused sampling design across an urban area of complex terrain. Journal of Exposure Science and Environmental Epidemiology, 26(4), 385-396.
Turner, A. K., and Miles, R. D. (1970). The GCARS system: A computer-assisted method of regional route location (No. FHWA/IN/JHRP-70/27). Purdue University, Joint Highway Research Project.
Umer, A., Hewage, K., Haider, H., and Sadiq, R. (2016). Sustainability assessment of roadway projects under uncertainty using Green Proforma: An index-based approach. International Journal of Sustainable Built Environment, 5(2), 604-619.
UNESCO (1971). Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat. Ramsar, Iran.
United Nations (2015). Sustainable Development Goals. United Nations.
Wang, Y., Veneziano, D., Russell, S., and Al-Kaisy, A. (2016). Traffic safety along tourist routes in rural areas. Transportation Research Record, 2568(1), 55-63.
World Health Organization. (2021). Global status report on road safety 2021. World Health Organization.
You, K., Yu, Q., Huang, W., and Hu, Y. (2022). Safety-Based Optimization Model for Highway Horizontal Alignment Design. Mathematical Problems in Engineering, 2022.