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Khan, Tathagatha
- Modelling Lateral Width for Merging of U-Turning Vehicles in Divided Urban Roads
Abstract Views :173 |
PDF Views:97
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
2 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
2 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
Source
Current Science, Vol 120, No 11 (2021), Pagination: 1768-1777Abstract
The present study was carried out to understand the lateral width for merging (LWM) characteristics and for developing LWM prediction models for U-turning vehicles. Data were collected from 14 test sections using videography. The collected data were analysed and it was observed that various operational characteristics, namely service delay, occupancy time and approaching through traffic volume influence LWM of U-turning vehicles. Subsequently, utilizing the stepwise multilinear regression method, LWM prediction models were developed in six-lane and four-lane divided urban roads. Finally, using the proposed LWM85 prediction model, a geometrical augmentation scheme has been suggested. The present study holds significance to enhance the level of service and safety at uncontrolled mid-block median openings.Keywords
Geometrical Augmentation, Heterogeneous Traffic, Lateral Width for Merging, Mid-Block Median Opening, U-Turning Vehicles.Full Text
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- Influence of driver and vehicle attributes on operational characteristics of U-turning vehicles
Abstract Views :188 |
PDF Views:106
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
1 Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, IN
Source
Current Science, Vol 122, No 6 (2022), Pagination: 705-716Abstract
Mid-block median openings (MBMOs) are provided to take a U-turn, which is a complex process. To make this movement a vehicle has to stop at the MBMO to find a suitable gap in the approaching through traffic stream. Two parameters, namely, service delay (SD) and occupancy time (OT) are crucial operational characteristics of an MBMO, which significantly affect traffic operation. The present study examines the influence of driver behaviour and vehicle attributes on SD and OT at six-lane and four-lane divided roads. From statistical analysis, SD was observed to be less at low approaching through traffic volume (ATTV) compared to high ATTV, whereas OT was observed to be high at low ATTV, and it decreased with increase in ATTV. Male drivers showed aggressive driving behaviour compared to female drivers, and the same was validated using a two-tailed t-test. Moreover, personal vehicles were found to behave defensively compared to commercial vehicles. Also, loaded vehicles were observed to turn their steering slowly being concerned about the safety of their passengers and goods compared to empty vehicles. The findings of this study will be beneficial in validating simulation results, defining level of service, etc. for planners in regulating the traffic efficiently.Keywords
Approaching through traffic volume, driver behaviour, heterogeneous traffic, mid-block median opening, vehicle attributes.Full Text
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