Abstract
The topological structure of road network is a significant factor that shapes the city. Evaluation of the road network is therefore an important aspect of urban transportation planning. Connectivity refers to the density of connections within a transport network. Increased connectivity tends to increased accessibility and mobility of the road network. Recent advancement in geographic information system (GIS) has enhanced the understanding of the topographical properties of road networks. The aim of this paper is to analyse the connectivity of the road network of 36 wards of Thiruvananthapuram district of Kerala based on graph theory. Connectivity indices are computed using the Network Analyst extension of ArcGIS. The different parameters include cyclomatic number, alpha index, beta index, gamma index, eta index, network density, intersection density, completeness, etc. Statistical analysis is carried out to find the relationship that exists between these parameters. The road pattern was also identified based on these indices. The variations of the network parameters at two spatial levels were also determined. The study aims to evaluate the effectiveness of the road network in terms of connectivity and coverage that in turn highlights its accessibility. Accessibility of the wards via road network was computed using Shimbel index.
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