Effect of Driver Distraction on Vehicle Speed Control

2021 ◽  
Vol 65 (1) ◽  
pp. 958-962
Author(s):  
M.S. Emily Parcell ◽  
M.S. Shivani Patel ◽  
Cameron Severin ◽  
Yoona Cho ◽  
Alex Chaparro
Keyword(s):  
Performance Measures ◽  
Secondary Task ◽  
Longitudinal Velocity ◽  
Speed Control ◽  
Course Completion ◽  
Driver Distraction ◽  
Vehicle Speed ◽  
Slowing Down ◽  
Driving Speed ◽  
Measures Of Performance

Performing a secondary task while driving impairs various performance measures, including speed control. Distraction is associated with reductions in driving speed; however, this is often based on global measures of performance, such as course completion time or mean speed. This study investigated how a secondary task affected granular speed variation. Participants (N=16, ages 18-43) performed a secondary task of mentally subtracting pairs of numbers while negotiating a simulated road course. Various driving performance measures were obtained but only results for longitudinal velocity are reported. The results reveal that drivers exhibited significant increases and decreases (>2+/- SD) in vehicle speed under distraction, with participants showing a stronger tendency to decrease their speed (60% of the observed speed violations). This may explain why global measures of driving speed under distraction reveal a slowing down. These results may increase our understanding of the nuanced effects of distraction on driving and be useful for predicting/diagnosing distracted driving behavior.

Speed regulation control of tractors’ new dual-flow transmission system based on slip rate resistance classification

2021 ◽  
pp. 095440702110105
Author(s):  
Guang Xia ◽  
Yan Xia ◽  
Xiwen Tang ◽  
Linfeng Zhao ◽  
Baoqun Sun
Keyword(s):  
Control Strategy ◽  
Control Algorithm ◽  
Production Efficiency ◽  
Sliding Mode ◽  
Slip Rate ◽  
Speed Control ◽  
Working Environment ◽  
Vehicle Speed ◽  
Speed Change ◽  
Simulation Results

Fluctuations in operation resistance during the operating process lead to reduced efficiency in tractor production. To address this problem, the project team independently developed and designed a new type of hydraulic mechanical continuously variable transmission (HMCVT). Based on introducing the mechanical structure and transmission principle of the HMCVT system, the priority of slip rate control and vehicle speed control is determined by classifying the slip rate. In the process of vehicle speed control, the driving mode of HMCVT system suitable for the current resistance state is determined by classifying the operation resistance. The speed change rule under HMT and HST modes is formulated with the goal of the highest production efficiency, and the displacement ratio adjustment surfaces under HMT and HST modes are determined. A sliding mode control algorithm based on feedforward compensation is proposed to address the problem that the oil pressure fluctuation has influences on the adjustment accuracy of hydraulic pump displacement. The simulation results of Simulink show that this algorithm can not only accurately follow the expected signal changes, but has better tracking stability than traditional PID control algorithm. The HMCVT system and speed control strategy models were built, and simulation results show that the speed control strategy can restrict the slip rate of driving wheels within the allowable range when load or road conditions change. When the tractor speed is lower than the lower limit of the high-efficiency speed range, the speed change law formulated in this paper can improve the tractor speed faster than the traditional rule, and effectively ensure the production efficiency. The research results are of great significance for improving tractor’s adaptability to complex and changeable working environment and promoting agricultural production efficiency.

scholarly journals Vehicle Speed Control and Accident Prevention System in Smog Zone

2021 ◽  
Vol 1916 (1) ◽  
pp. 012093
Author(s):  
M Kathirvelu ◽  
A C Nithia shree ◽  
M Manasa ◽  
L Naveen ◽  
N Karthi
Keyword(s):  
Speed Control ◽  
Accident Prevention ◽  
Vehicle Speed ◽  
Prevention System

The Effects of Telematics on Driver Distraction

2002 ◽  
Vol 46 (22) ◽  
pp. 1868-1870 ◽  
Author(s):  
Patrick Siebert ◽  
Mustapha Mouloua ◽  
Kendra Burns ◽  
Jennifer Marino ◽  
Lora Scagliola ◽  
...  
Keyword(s):  
Secondary Task ◽  
Cell Phone ◽  
Driving Simulator ◽  
Systems Design ◽  
Driver Distraction ◽  
Cellular Phones ◽  
Driver Safety ◽  
A Cell ◽  
Driving Task ◽  
Simulated Driving Task

This study used both cellular phones and analogue radio to measure driver distraction and workload in a low fidelity driving simulator. Thirty-four participants performed a simulated driving task while using either a cell phone or a radio in conjunction with a secondary task assessing their spare attentional capacity. The results showed that more lane deviations were made during the cell phone and radio tuning use than both of the pre-allocation and Post-allocation phases. The secondary task errors were also higher during both the cell phone and radio tuning allocation phase than the pre-allocation and post-allocation phases. These findings indicate the greater workload load levels associated with the use of telemetric devices. These findings have major implications for driver safety and telemetric systems design.

An Analysis of Commercial Vehicle Speed Control Concepts

1982 ◽  
Author(s):  
John F. Weiss ◽  
Claude M. Ligon ◽  
Claude Travis ◽  
Henry Seiff
Keyword(s):  
Commercial Vehicle ◽  
Speed Control ◽  
Vehicle Speed

Vehicle Speed Control System Simulation

2021 ◽  
Author(s):  
Markian Nakonechnyi ◽  
Oleksandr Viter ◽  
Orest Ivakhiv ◽  
Roman Velgan ◽  
Yuriy Hirniak ◽  
...  
Keyword(s):  
Control System ◽  
System Simulation ◽  
Speed Control ◽  
Vehicle Speed ◽  
Speed Control System

Corporate Female Leadership Effects Considering PSI20 and IBEX35 Companies' Performance

2019 ◽  
pp. 280-301
Author(s):  
Mara Madaleno ◽  
Elisabete S. Vieira ◽  
João P. C. Teodósio
Keyword(s):  
Board Of Directors ◽  
Performance Measures ◽  
Positive Influence ◽  
Performance Measure ◽  
Female Leadership ◽  
Accounting Performance ◽  
The Board Of Directors ◽  
Female Presence ◽  
The Relationship ◽  
Measures Of Performance

Using a sample of 47 Portuguese and Spanish firms for the period 2010 to 2017, the authors study the relationship between female presence on board and firm's accounting (ROA and ROE) and market-based (MTB and Tobin's Q) performance. They find that women on the board of directors is positively related to firm's performance, as well as the gender of the CFO and the proportion of women on the listed key professionals, when we consider the market measures of performance, not being so consistent for accounting performance measures. Results were sensitive to the performance measure used. The results reinforce the political options of European Commission gender established quotas, revealing that in the Iberian countries these quotas are not being effectively implemented, even if results suggest that women on board in fact exert positive influence over market performance. This also led us to think that financial markets may also react in a positive way when the CFO of the company is a woman instead of a man, despite the sample limitations both in terms of gender and number of firms.

The Journey From Development to Appraisal

2019 ◽  
pp. 327-342
Author(s):  
Tracy M. Maylett
Keyword(s):  
Performance Management ◽  
Performance Appraisal ◽  
Performance Measures ◽  
Past Performance ◽  
360 Feedback ◽  
Objective Performance ◽  
Objective Performance Measures ◽  
Performance Appraisal Process ◽  
Measures Of Performance

This case study describes an initiative to change a long-standing performance management process at a large manufacturing facility within General Mills that emphasized the attainment of objective performance measures (the “what” of performance) to one that also included the “how” of goal achievement. The organization embarked on a 3-year pilot evaluation of the use of 360 Feedback as a possible solution to replace or supplement their traditional single-source (supervisor) performance appraisal process. The two systems ran in parallel using 140 randomly selected employees. Results showed little correlation between the what measures of performance from the traditional appraisals and the how data collected using the 360 Feedback, supporting the view that job performance should be viewed as requiring both aspects of evaluation, using different methods of assessment. Ultimately, the organization maintained both systems but integrated 360 Feedback into the traditional appraisals as well, creating complementary processes that looked “forward” (development) and “past” (performance).

scholarly journals Impact Assessment of Urban Flood on Traffic Disruption using Rainfall–Depth–Vehicle Speed Relationship

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 926 ◽  
Author(s):  
Kyung-Su Choo ◽  
Dong-Ho Kang ◽  
Byung-Sik Kim
Keyword(s):  
Urban Areas ◽  
Assessment Tool ◽  
Transportation Network ◽  
Flood Damage ◽  
Target Area ◽  
Vehicle Speed ◽  
Urban Flood ◽  
Socioeconomic Impacts ◽  
Flood Depth ◽  
Driving Speed

The transportation network enables movement of people and goods and is the basis of economic activity. Recently, short-term locally heavy rains occur frequently in urban areas, causing serious obstacles to road flooding and increasing economic and social effects. Therefore, in advanced weather countries, many studies have been conducted on realistic and reliable impact forecasting by analyzing socioeconomic impacts, not just information transmission as weather forecasts. In this paper, we use the Spatial Runoff Assessment Tool (S-RAT) and Flood Inundation model (FLO-2D model) to calculate the flooding level in urban areas caused by rainfall and use the flooding rate. In addition, the rainfall–flood depth curve and the Flood–Vehicle Speed curve were presented during the analysis, and the traffic disruption map was prepared using this. The results of this study were compared with previous studies and verified by rainfall events in 2011. As a result of the verification, the result was similar to the actual flooding, and when the same rainfall occurred within the range of the target area, it was confirmed that there were sections that could not be passed and sections that could be passed smoothly. Therefore, the results suggested in this study will be helpful for the driver’s route selection by using the urban flood damage analysis and vehicle driving speed analysis.

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