A Study on Evolution of Bus Priority System

Kim, Sung-Deuk

Journal of Navigation and Port Research 2005;29(5):465-473.
Published online June 30, 2005.

버스 통행우선신호 도입에 관한 연구

김성득

A Study on Evolution of Bus Priority System

Sung-Deuk Kim

Abstract

In the analysis of the foreign cases on the use of Transit Signal Priority(TSP), the reduction in bus travel time ranged from 6 to 32%. This study demonstrates how TSP can be applied to Ulsan Metropolitan City. TSP techniques were used on the bus routes that run eastward for 4.07 kilometers along Munsoo-Ro, a major artery in the most congested part of the city. The simulation was performed on one hour of peak traffic time, using the two TSP strategies of Early Green and Extended Green. The use of the Early Green strategy resulted in an average decrease in travel time ranging from 18.1 to 25.8 % and an increase in average travel speed ranging from 30.9 to 40.1 %. The Extended Green strategy resulted in an average decrease in travel time ranging from 18.1 to 30.3 % and an increase in an average travel speed of approximately 30.1 %. This study demonstrates that TSP is effective in decreasing travel time and increasing travel speed of the bus system in Korea.

Key Words: Bus;TSP;Ulsan;Early Green;Extended Green;Travel Time