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Chakrabarty, Neelima
- Assessment of Driver Vision Functions in Relation to their Crash Involvement in India
Abstract Views :541 |
PDF Views:113
Authors
Ashish Verma
1,
Neelima Chakrabarty
2,
S. Velmurugan
2,
B. Prithvi Bhat
3,
H. D. Dinesh Kumar
1,
B. Nishanthi
4
Affiliations
1 Department of Civil Engineering, Sustainable Transportation and Urban Planning, Indian Institute of Science, Bengaluru 560 012, IN
2 Traffic Engineering and Safety Division, Central Road Research Institute, Mathura Road, New Delhi 110 025, IN
3 Central Institute of Road Transport, Pune 411 026, IN
4 Department of Civil Engineering, National Institute of Technology, Tiruchirappalli 620 015, IN
1 Department of Civil Engineering, Sustainable Transportation and Urban Planning, Indian Institute of Science, Bengaluru 560 012, IN
2 Traffic Engineering and Safety Division, Central Road Research Institute, Mathura Road, New Delhi 110 025, IN
3 Central Institute of Road Transport, Pune 411 026, IN
4 Department of Civil Engineering, National Institute of Technology, Tiruchirappalli 620 015, IN
Source
Current Science, Vol 110, No 6 (2016), Pagination: 1063-1072Abstract
Among the human factors that influence safe driving, visual skills of the driver can be considered fundamental. This study mainly focuses on investigating the effect of visual functions of drivers in India on their road crash involvement. Experiments were conducted to assess vision functions of Indian licensed drivers belonging to various organizations, age groups and driving experience. The test results were further related to the crash involvement histories of drivers through statistical tools. A generalized linear model was developed to ascertain the influence of these traits on propensity of crash involvement. Among the sampled drivers, colour vision, vertical field of vision, depth perception, contrast sensitivity, acuity and phoria were found to influence their crash involvement rates. In India, there are no efficient standards and testing methods to assess the visual capabilities of drivers during their licensing process and this study highlights the need for the same.Keywords
Crash Involvement, Driver Licensing, Generalized Linear Modelling, Visual Functions.Full Text
References
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- Evaluation of Fixation and Reaction Gaze Points Near Speed Humps on Urban Roads in India
Abstract Views :81 |
PDF Views:69
Authors
Affiliations
1 CSIR-Central Road Research Institute, Delhi–Mathura Road, New Delhi 110 025, India., IN
1 CSIR-Central Road Research Institute, Delhi–Mathura Road, New Delhi 110 025, India., IN
Source
Current Science, Vol 124, No 2 (2023), Pagination: 245-252Abstract
Isolated speed humps are extensively used as speed-calming measures for motorized vehicles of different categories on urban roads. Most urban roads in India are provided with either a trapezoidal or circular speed hump based on the road category. The height of these humps influences the per cent reduction of speed at the crown of the hump. It has been observed that passenger motorized vehicles do not reduce their speeds before a speed hump, even when it is large. The objective of this study was to evaluate the driver perception and reaction distance near a speed hump and thereby examine the sensitivity of these parameters on the drivers of different age groups. For this, drivers of different ages (a total sample size of five subjects) were considered for real-time eye-tracking experiments. The experimental results of all subjects’ eye tracking images were examined in this study. The visit duration or dwell time for an area of interest (AOI) was estimated and compared among various drivers. The speed data were also collected using a velocity-box along with eye-tracking data of each driver at the identified location. The collected eye-tracking experimental data were analysed using statistical techniques. Regression analysis between vehicular speed and fixation count was performed. It was observed that the power model was the best fit for the collected data. The visualization data helped to reveal the characteristics of fixation and reaction gaze points near the identified speed humps. The study results showed that driver attention was double when vehicle located between 0 and 20 m than 20 and 40 m from the speed hump. Drivers in the age group between 20 and 25 years had 48% AOI of visit duration, while for those in the age group between 30 and 40 years, it was 67%.Keywords
Eye Tracker, Gaze Plots, Heat Maps, Regression Analysis, Speed Hump, Urban Roads.Full Text
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