Abstract
Recently, the number of studies involving complex network applications in transportation has increased steadily as scholars from various fields analyze traffic networks. Nonetheless, research on rail network growth is relatively rare. This research examines the evolution of the Public Urban Rail Transit Networks of Kuala Lumpur (PURTNoKL) based on complex network theory and covers both the topological structure of the rail system and future trends in network growth. In addition, network performance when facing different attack strategies is also assessed. Three topological network characteristics are considered: connections, clustering and centrality. In PURTNoKL, we found that the total number of nodes and edges exhibit a linear relationship and that the average degree stays within the interval [2.0488, 2.6774] with heavy-tailed distributions. The evolutionary process shows that the cumulative probability distribution (CPD) of degree and the average shortest path length show good fit with exponential distribution and normal distribution, respectively. Moreover, PURTNoKL exhibits clear cluster characteristics; most of the nodes have a 2-core value, and the CPDs of the centrality’s closeness and betweenness follow a normal distribution function and an exponential distribution, respectively. Finally, we discuss four different types of network growth styles and the line extension process, which reveal that the rail network’s growth is likely based on the nodes with the biggest lengths of the shortest path and that network protection should emphasize those nodes with the largest degrees and the highest betweenness values. This research may enhance the networkability of the rail system and better shape the future growth of public rail networks.
Highlights
The traffic network represents the fundamental structure of a city
In Malaysia, Mohamad studied the rail network expansion process in Kuala Lumpur based on daily service times, coverage area, automobile equipment, running policies, traffic capacity, service objects and line integration to describe the basic rail transit situation, including necessary facilities, bus services, and private cars [27]
We will review and introduce the indicators used in the network design of public rail systems to test and calculate the performance and status of the PURTNoKL
Summary
The traffic network represents the fundamental structure of a city. As the carrier of its transportation activities and functions, it can be considered the aorta of a city’s economy and its operational development. In Malaysia, Mohamad studied the rail network expansion process in Kuala Lumpur based on daily service times, coverage area, automobile equipment, running policies, traffic capacity, service objects and line integration to describe the basic rail transit situation, including necessary facilities, bus services, and private cars [27]. The KL Monorail Line is the only urban monorail system in inner Kuala Lumpur It is 8.6 km long, stops at 11 stations, has been linked with KL Sentral since August 2003, and is connected to the Ampang LRT Line by 2 stations. The MRT Sungai Buloh-Kajang Line, which is expected to be completed in 2017, will link the entire network from west to east, starting from Sungai Buloh station, running across KL Sentral and the Bukit Bintang area, and connecting the Kelana Jaya, Ampang, Sri Petaling and KL Monorail Lines before terminating at Kajang station
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