Effect of Changing Driving Conditions on Driver Behavior Towards Design of a Safe and Efficient Traffic System
Author(s):
F. Aghazadeh, L. Hughes Ikuma, S. Ishak
Publication Date:
December 2014
Abstract:
This simulation-based study explores the effects of different work zone configurations, varying distances between traffic signs, traffic density and individual differences on drivers' behavior. Conventional Lane Merge (CLM) and Joint Lane Merge (JLM) were modeled in a driving simulator and thirty participants (seven female and 23 male students) navigated through the two configurations with two levels of traffic density and in three different conditions: a) standard sign distance, b) 25% reduction, and c) 25% increase in the distance between traffic signs in the advance warning zone. Information regarding travel time, speed, braking force and location of merge was collected through the simulator. Self-reported measures of mental demand, physical demand, temporal demand, performance, effort, frustration and total workload were recorded from all participants by using the NASA TLX. The results show that, on average, driving through the JLM took 18.8% longer than the CLM. Moreover, no significant difference in speed was found between the two merge configurations. However, the percent maximum braking force was34% lower in the JLM configuration. The comparison of two merge configurations with respect to the location of changing lanes suggest that overall, the JLM configuration encourages drivers to remain in the closed lane longer. The analysis of self-reported workload ratings shows that participants reported 15.3% lower total workload and 18.8% higher performance when driving through the JLM. Moreover, mental demand, temporal demand, effort and frustration were lower in JLM by 16.4%, 23.4%, 13.7% and 28%, respectively. In terms of self-reported workload, the JLM is more conducive to driving. In conclusion, the JLM outperforms the CLM.
Report Number:
SWUTC/13/600451-00103-1
Electronic Link(s):
Document/Product
http://swutc.tamu.edu/publications/technicalreports/600451-00103-1.pdf
Publication/Product Request
TTI reports and products are available for download at no charge. If an electronic version is not available and no instructions on how to obtain it are given, contact the TTI Library.