Comparative Traffic Performance Analysis of Urban Transportation Network Structures

TL;DR

This study compares traffic performance across seven urban network structures using traffic measures and network indicators, finding that 2-ring web networks perform best in efficiency, especially in large, congested cities.

Contribution

It introduces a comparative analysis of various urban network structures under different demand conditions using traffic performance metrics.

Findings

2-ring web networks are most efficient overall.

Grid and 1-ring networks perform well in large urban areas.

Branch, 3-directional grid, and radial networks suit small, uncongested cities.

Abstract

The network structure of an urban transportation system has a significant impact on its traffic performance. This study uses network indicators along with several traffic performance measures including speed, trip length, travel time, and traffic volume, to compare a selection of seven transportation networks with a variety of structures and under different travel demand conditions. The selected network structures are: modified linear, branch, grid, 3-directional grid, 1-ring web, 2-ring web, and radial. For the analysis, a base origin-destination matrix is chosen, to which different growth factors are applied in order to simulate various travel demand conditions. Results show that overall the 2-ring web network offers the most efficient traffic performance, followed by the grid and the 1-ring networks. A policy application of this study is that the branch, 3-directional grid, and radial networks are mostly suited for small cities with uncongested traffic conditions. In contrast, the 2-ring web, grid, and 1-ring web networks are better choices for large urban areas since they offer more connectivity, thus allowing them to perform efficiently under congested traffic conditions.