Training on evaluation and re-calibration of a transport model
By Angad Gadgil 28 November, 2013 | Bangalore
A one-day intensive training workshop on evaluating and re-calibrating a transport model was organised by EMBARQ India for the officials of the Directorate of Urban Land Transport (DULT), Government of Karnataka, in Bangalore on the 28th of November, 2013. The workshop was conducted by Vamsee Modugula, a modeling expert and Srikanth Shastry and Angad Gadgil from EMBARQ India and attended by 12 officials from DULT.
The Government of Karnataka set up the Directorate of Urban Land Transport (DULT) under the aegis of the Department of Urban Development with the primary objective of coordination of planning and implementation of programs and projects in the field of Urban Transport in the state of Karnataka. Development of City Mobility Plans (CMPs) for cities in Karnataka is one of the major projects of DULT and DULT is in the process of preparing CMPs for 9 different cities. This workshop was organised to help the staff of DULT to gain an understanding and expertise in evaluating and re-calibrate transport models for cities in order to incorporate them into the CMPs. The first session was based on the evaluation of transport models and commenced with a brief introduction of travel demand forecasting and the importance of demand assessment planning. Examples of the outcomes of incorrect demand assessment were discussed along with the reasons for incorrect forecasts with the current deficiencies and the solutions to these issues. Best practices of modelling were prescribed and the advantages of these best practices were presented. Key steps in demand assessment planning according to the scale of the model were discussed. An extensive discussion on the data required, quality of data and the checks needed to review the available data took place. The four step modelling process was explained.
The second session comprised of discussions on re-calibrating existing transport models to get better projection outputs. The case study of the Bangalore model was used as an example. Outputs and projections from the available model were compared with the outputs and projections with the re-calibrated Bangalore transport model. Different factors influencing the changes were discussed and the methods of fitting the model into the current context were shown. Validation of input data is an important part of re-calibrating a transport model. The methods of validating the model data were discussed along with different kinds of data checks and their uses. Uses and implications of data assumptions were discussed in detail along with the process of arriving at data assumptions.
The workshop concluded with a question and answer session where major practical issues of evaluation and re-calibration of transport models were resolved.
The training was very well received by the DULT officials who are now in a position to incorporate this knowledge in the preparation of the current 9 city CMP projects and the future projects to get better travel demand projections and ensure high quality CMPs are prepared. This is an important step ahead because quality CMPs will help address the mobility needs of all people and the infrastructure requirement for all modes, as well as integrate both the spatial distribution of activities and transport systems.