AN ALTERNATIVE MEASURE TO MITIGATE CONGESTION ALONG BASELINE ROAD THROUGH CAPACITY AUGMENTATION OF AVAILABLE LINKS – A GIS BASED APPROACH

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Year:
2016
Type of Publication:
Proceedings
Keywords:
Spatial, temporal, variations, balancing approach, evidence based
Authors:
Jayalath, Granie R; Padmani, Nayana
Abstract:
The issue of urban congestion had so far been an unresolved issue despite having very expensive mobility infrastructure already in place and it seems many more similar expensive infrastructures are further lineup for implementation. We have now realized that the steel flyovers erected over at grade intersections have not been an effective intervention to mitigate congestion on the long run, instead they take up the burden from one end and pass over to another point few hundred meters away, yet life spans of these steel structures will remain up to 100 more years. When the impact of high mobility expressway network (170.8km) is concerned it has been a relief mainly for long distance travellers, but the contribution of this network towards mitigation of city congestion & its immediate suburb so far had been very marginal. Congestion along Baseline road has reached to unbearable status warranting immediate relief measures. Study of temporal and spatial variation of volume/ capacity of selected alternative routes revealed that a considerable share of traffic bounded for Rajagiriya and Battaramulla, coming along A1, A3, E03 could make use these alternative links instead of entering to Baseline road via New Kelani Bridge. An analysis had been carried out by adopting. “volume/capacity balancing approach” to illustrate quantitatively, what share of traffic could be diverted out from the Baseline road. This study confirmed that volume/capacity balancing approach could be effectively managed using GIS based decision supportive environment. This approach could be used to bring down the congestion of Baseline road to optimum levels and the same approach could be adopted for other cities in general. Further through this study authors have arrived at recommendations for the formulation of evidence based policies for the management of urban city congestion.
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