R4TLI - 2023

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Browsing R4TLI - 2023 by Author "Abenayake, C"

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    Evaluating the age-friendliness of transport system in Sri Lankan cities
    (Sri Lanka Society of Transport and Logistics, 2023-08-26) Ranasinghe, R; Hewawasam, C; Abenayake, C; Gunaruwan, TL
    Nowadays as one of the key areas of urban planning and design, health concerns of the community, with high vulnerability on older population have re-appear. Over the time, the elderly population around the world are predicted to increase and Sri Lanka follows the same trend. In this context, the concept of ‘Age-friendly Cities’ introduced by WHO comes to play. WHO has identified, ‘Transport and Mobility’ as one of the eight priority domains for policy action in order to build age-friendly cities. Since without transportation, other facilities and services are inaccessible, transportation plays a major role in a city design. How to effectively understand the age-friendliness of a city’s transport system and diagnose the underlying problems of urban development have therefore become critical in managing this demographic change. Previous studies have not yet provided a proper methodology for quantification of age-friendliness of transport system in Sri Lankan cities. This study aims to evaluate the age-friendliness of transport system in Sri Lankan cities by incorporating quantitative indicator-based examination. Three case study areas; Negombo, Kurunegala and Kandy, were employed and the results show that the age-friendliness of transport system in each city is 59.29%, 68.25% and 66.98% respectively.
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    Thermal comfort modeling on urban streets
    (Sri Lanka Society of Transport and Logistics, 2023-08-26) Mendis, L; Jayasinghe, A; Abenayake, C; Gunaruwan, TL
    “Walkability” is a vital constituent on Urban Streets and is a sustainable transportation mode for pedestrians in highly urbanized cities. Psychological comfort of pedestrians is predominantly defined by enhancing walkability on urban streets. Thermal comfort is one of the key attributes for pedestrian comfort and wellbeing. This study considers thermal comfort on urban streets in assessing, walkability by considering the Thermal Heat Indexes (THI) and investigating the Predicted Mean Volt (PMV) values. Empirical data were analyzed and discussed the behavior of measured Air Temperature and Thermal Heat Index (THI) values of selected urban streets. To explore the thermal comfort levels on streets, ENVI-met 4.1 computer simulation and analyzed data on Air temperature, Mean Radiant Temperature (MRT) and Predicted Mean Vote (PMV) values were used. According to the empirical Data, the THI value is higher on Location 01-Main Street than other urban streets. As per the results of the ENVI-met computer simulation, the changing Building Height scenario indicates a significant effect on the thermal comfort as opposed to the tree lines along both sides of the street. Findings from this research express that increasing building height and increasing tree density by proposing a large expanse of vegetation along streets is significantly associated with the thermal comfort conditions on urban streets and enhance the level of walkability as an effective green transport mode.