Research Papers - Department of Civil Engineering

Permanent URI for this collectionhttps://rda.sliit.lk/handle/123456789/598

Browse

Filters

2020 - 20212

Advanced Search

Filter by

Settings

Author: search.filters.author.Ranawaka, R. K. T. KHas files: Yes

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    PublicationEmbargo
    Incorporating road safety Into rural road network pavement management
    (Taylor & Francis, 2021-06-25) Pasindu, H. R; Ranawaka, R. K. T. K; Sandamal, R. M. K; Dias, T. W. K. I. M
    Rural roads play an essential part in a country’s road network providing connectivity between the rural communities and the national roads. However, most of these roads are not maintained efficiently and safety issues are often not prioritised since pavement conditions are prioritised, especially in developing countries. Lack of reliable crash data, road condition monitoring regime are often cited as reasons. This study proposes a methodology to incorporate road safety performance in rural roads in maintenance planning using a multi-objective optimisation approach. Road safety performance is defined in terms of the Cumulative Safety Index (CSI), computed based on the severity, exposure, frequency of safety issues, identified in road safety audits. Safety performance and pavement condition-related indices such as International Roughness Index (IRI), pothole number, are included in the optimisation analysis. It comprises two objectives: minimise network IRI, and minimise network CSI. Applicability of the developed model has been demonstrated from the illustrative example of a rural road network. Results shows that roads with safety issues can also be prioritised in budget allocation while ensuring the network level pavement condition can be maintained at a reasonable level. This methodology offers a simplified approach to incorporate road safety issues in rural road PMS.
  • Thumbnail Image
    PublicationEmbargo
    A Framework to Incorporate Safety Performance for Low Volume Roads in Pavement Management Systems
    (IEEE, 2020-07-28) Sandamal, R. M. K; Ranawaka, R. K. T. K; Pasindu, H. R
    Low volume roads provide the connectivity between residential, agricultural areas and the national road network. Those are especially critical in rural areas to provide accessibility for the community to fulfill their social and economic needs. Low volume roads account for nearly 61% of the road network length in Sri Lanka while the rapid motorization take place, it is expected the traffic volume on these roads will increase significantly in the future. However, some of these roads have not been constructed and maintained according to the standard design guidelines, and due to that major safety issues are raised on such roads. This study focusses on the main causal factors of low volume road accidents and a methodology developed to evaluate the safety performance based on the roadway characteristics. Further, a framework is proposed to incorporate safety performance in decision criteria especially in the multi-objective optimization process of pavement management systems.