Analysis and Development of Traffic Speed-Flow-Density Relationships for Urban Roadway
Thasneem Nadirsha1, Archana S2
1Thasneem Nadirsha, Department of Civil Engineering, Jyothi Engineering College, Cheruthuruthy, Thrissur (Kerala), India.
2Archana S, Department of Civil Engineering, Jyothi Engineering College, Cheruthuruthy, Thrissur (Kerala), India.
Manuscript received on 05 December 2018 | Revised Manuscript received on 19 December 2018 | Manuscript published on 30 December 2018 | PP: 97-101 | Volume-8 Issue-2C, December 2018 | Retrieval Number: 100.1/ijeat.ICID-2018_TE_213
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Abstract: India is a developing country containing heterogeneous traffic, which is characterized by wide variations in traffic characteristics. The new technologies offer the greatest challenge and hope for improving the quality of traffic system. The ability to apply traffic flow fundamentals is an essential ingredient in working toward improving the transportation system. The present study is concerned with macroscopic traffic flow characteristics observed on 4-lane divided carriageway [Thrissur-Kunnamkulam (SH-69)]. The intention of this paper was to analyse traffic flow, density, and speed for developing a model that provide the exact character of traffic flow. Traffic flow fundamental diagrams are used to characterize the relationship between these parameters. Study of traffic flow involves selection of location, videographic survey, analysis of video recordings, statistical analysis and calculation of basic parameters of traffic flow. Data extracted are compiled for each direction. Scatter diagrams were plotted by using the collected data. The relationship between parameters was developed based on regression analysis using statistical software SPSS 21. The speed-density function obtained was compared to macroscopic models such as Greenshield’s model and Greenberg’s model. By using speed-density model, flow-density and speed-flow relationships are predicted for the given highway. Further validation of the predicted model is done using graphical residual analysis. This succeeded to develop new models enabling theoretical determination traffic parameters for a given urban roadway.
Keywords: Fundamental Diagrams, Heterogeneous Traffic, Macroscopic Parameters, Scatter Diagrams.
Scope of the Article: Structural Reliability Analysis