Related Experiment Video
Updated: Sep 22, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
Published on: January 20, 2023
A two-stage simulation analysis of uncertain road damage on the urban emergency delivery network
Yinghua Song1,2, Ke Wu1,2, Dan Liu1,2
1China Research Center for Emergency Management, Wuhan University of Technology, Wuhan, Hubei, People's Republic of China.
Abstract:
When a city encounters a natural disaster, the traffic capacity of the road will change uncertainly over time as the disaster spreads. At this time, it will affect the overall distribution of the urban road network. Therefore, in order to ensure the normal operation of the city, evaluate the objective regularities of impact is of great significance and urgency to emergency decision-makers. The extent and scope of road damaged in the disaster-stricken area varies with time due to the impact of natural calamities. To reveal the regularities impact, this paper provides a two-stage analysis method based on the distribution path of the road network, offering basic data analysis and nonlinear fitting regression analysis on distribution costs, spatial accessibility and distribution efficiency. This study uses the degree of road network damage and the double randomness of road damaged to establish a transportation model for dynamic simulation analysis. The research results show that the delivery regularity of costs, spatial accessibility, and efficiency present the s-curve changes obviously. There are obvious inflection points when the damaged road percentage reaches about 10%-15% and 30%-40%. Therefore, the most suitable delivery route and time can be selected to maximize efficiency and reduce losses.
Related Concept Videos
Design Example: Alignment of a Road Line Using GIS
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
Manipulation and Analysis
Multimachine Stability
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
Distributed Loads: Problem Solving
Rolling Resistance: Problem Solving

