International Journal of Transportation Engineering

International Journal of Transportation Engineering

Presentation of a Multiple Regression Model to Determine the Distance of Primary Arterial Roads and Building Density in a Radial-Circular Network

Document Type : Research Paper

Authors
Gholamali Behzadi 1
zeinab Mohammadi 2
1 Assistant Professor, Faculty of Civil Engineering, Shomal University, Amol, Iran
2 PhD Student of Civil Engineering Faculty, Shomal University, Amol, Iran
10.22119/ijte.2025.509305.1690
Abstract
The form of urban networks plays a crucial role in the efficiency of traffic flow. Small deficiencies in the geometric design or spatial distribution of arterial networks can disrupt traffic continuity, reduce operational efficiency, and lead to increased congestion in urban transportation systems. The distance between roads with different functions is one of the most significant parameters affecting traffic in urban networks. Therefore, in this study, a radial-circular network was designed with primary arterial roads at varying distances (800 and 1200 meters) and building densities ranging from 100% to 250%. Using AIMSUN software, the network was simulated, and traffic parameters were extracted. Subsequently, a predictive model was developed using multiple regression analysis, with primary arterial road distance as the dependent variable and building density and traffic parameters as independent variables. The results indicated that the final model achieved a distance prediction accuracy of 0.949 for primary arterial roads. The variables of density (with a negative influence), stop time, operational speed, and queue length had a significantly greater impact on predicting the functional distance of primary arterial roads. Specifically, higher building density is associated with a decrease in the optimal spacing of these roads, whereas longer stop times and greater queue lengths contribute to increased spacing requirements. Moreover, an increase in land use density and the functional distance of roads leads to a higher increase in vehicle queue length, particularly in the three-ring network with a distance of 800 meters between roads. Additionally, as similar values increase, the stop time of vehicles also rises.
Keywords
Building density
distance of arterial roads
delay
flow rate
travel time
queue length
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International Journal of Transportation Engineering
Volume 13, Issue 3 - Serial Number 51
Winter 2026
Pages 2325-2345