Showing papers by "Satish Chandra published in 2019"
01 Jun 2019
TL;DR: Heterogeneous traffic conditions prevail in all countries across the world, but the degree of heterogeneity is different in developed and developing countries, and in the United States, heavy trucks are a major source of heterogeneity.
Abstract: Heterogeneous traffic conditions prevail in all countries across the world, but the degree of heterogeneity is different in developed and developing countries. In the United States, heavy v...
21 citations
TL;DR: The output of the study indicates that the proposed model may be used to estimate the platoon dispersion distance with reasonably high accuracy under mixed traffic conditions.
Abstract: Vehicles generally move in the form of platoons after discharging from the stop line of signalized intersection. While moving toward the downstream signal, due to the interaction between moving vehicles, road geometry, traffic composition and their speed difference, platoons get dispersed. Dispersion of platoon influences signal co-ordination, arrival pattern, turning maneuver at upstream signal. Moreover, while designing the intersection under mixed traffic scenario, platoon dispersion is important to create a link between traffic signals. Therefore, the present study is taken up with the objective of estimating the platoon dispersion distance after crossing the stop line. A model is developed based on the simulated data sets. VISSIM, a micro-simulation software, is used to replicate the field traffic conditions. To ensure the applicability of the model in the existing mixed traffic conditions, two different methods were used. Firstly, data were collected from two sites and used for validating the performance of the model. The results indicated a good match (maximum 9% error) between the field-observed and model-estimated platoon dispersion distance. Secondly, the traffic scenario alike the two study sites was created in VISSIM and the simulated and field-observed data sets were compared to check how accurately VISSIM can replicate the existing mixed traffic conditions. It is observed that VISSIM had replicated the field conditions with a maximum error of 10%. Therefore, the output of the study indicates that the proposed model may be used to estimate the platoon dispersion distance with reasonably high accuracy under mixed traffic conditions.
7 citations
TL;DR: In this article, the electronic and elastic properties of AIIB2IIIC 4VI defect-chalcopyrite semiconductors have been studied using first-principle density functional theory (DFT) calculations.
Abstract: The electronic and elastic properties of AIIB2IIIC 4VI defect-chalcopyrite semiconductors have been studied using first-principle density functional theory (DFT) calculations. The lattice constants...
4 citations
TL;DR: The silhouette indices obtained justify the proposed delay ranges corresponding to the clusters and indicate the possible implementation of the proposed LOS for rating the performance of signalized intersections of India.
Abstract: Significant work on level of service (LOS) has been conducted around the globe over the last two decades. However, till date, no guidelines exist for LOS of signalized intersections in India. The present study attempts to introduce LOS criteria for signalized intersection under mixed traffic condition. Thirteen intersections from four different cities of India were chosen for this study. Delay at intersections (which is the backbone for deriving LOS) is estimated using the area estimation method (according to HCM 2010). Clustering technique (to be specific, K-mean clustering) has been used to classify six clusters of delay corresponding to six different LOS and arrive at a LOS criteria. Silhouette method has been employed to validate the proposed delay clusters. The silhouette indices obtained justify the proposed delay ranges corresponding to the clusters and indicate the possible implementation of the proposed LOS for rating the performance of signalized intersections of India.
3 citations