|Table of Contents|

Integrated optimization model of pedestrian-public transit emergency evacuation(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年03期
Page:
79-86
Research Field:
交通运输规划与管理
Publishing date:

Info

Title:
Integrated optimization model of pedestrian-public transit emergency evacuation
Author(s):
PAN Shu-liang1;  YU Jie1;  LIU Yue2
1. School of Control Science and Engineering, Shandong University, Jinan 250061, Shandong, China; 2. Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, Milwaukee 53201, Wisconsin, USA
Keywords:
public transit;  emergent event;  emergency evacuation;  pedestrian;  integrated optimization model;  tabu search
PACS:
U491
DOI:
-
Abstract:
Aiming at emergent event in large-scale public, an integrated optimization model of emergency evacuation was developed based on public transit. In the model, the problem of emergency evacuation was summarized as a two-level optimization network including pedestrian traffic flow and public transit network. The first-level framework guided evacuees from accident sites(e.g. buildings)to designated pick-up points(e.g. bus stops). The second-level framework properly dispatched and routed a fleet of buses at different transit depots to the pick-up points, and transported evacuees to safe places finally. Integrated optimization model was tested and verified by using a two-stage heuristic algorithm based on tabu search. Verification result indicates that 8 buses are used for the evacuation of all 328 people in the network. The output result of integrated optimization model is not sensitive to the change of weight assignment of objective function, so the model has strong robustness. Comparing with the optimization software of CPLEX, heuristic algorithm can get near optimum solution in 1 h, and the error between near optimum solution and optimal solution is less than 15%. The interactions between evacuees distribution and bus route optimization are fully considered in the model. The pedestrian traffic flow and the public transit network during evacuation process are concurrently optimized. 9 tabs, 5 figs, 21 refs.

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Last Update: 2014-06-30