Workload-study of ISA-drivers - A method description.
Author
Summary, in English
On the decision of the Swedish government, the Swedish National Road Administration (SNRA) has started a large-scale trial with Intelligent Speed Adaptation (ISA) in urban areas. One of the four test sites is the city of Lund. At the Department of Technology and Society, Lund University, research about ISA has been carried out since 1986 and the first field study was carried out in 1993. The ongoing large scale trial is based on experience from previous research on the concept of ISA.
One hypothesis regarding the effects of ISA is that the drivers will drive slower and in a more relaxed way, thus reducing the workload induced by the driving task. In order to test this hypothesis, 25 test-subjects will drive an instrumented vehicle on a predetermined route. The route consists of both urban and rural environment of varying complexity. In total, the test-drives will be carried out three times, before using ISA, after using it for a short period and finally after one year driving with ISA.
During the test-drive the drivers will carry out a secondary task called “peripheral dot detection”. The task consists of responding to two lights, one on each side of the driver, by pressing one of two buttons, one for each light. The lights will be lit for 0.75 seconds and the response time, missed responses and left / right errors will be registered.
In addition to the secondary task a number of other indicators of workload will be used such as lane position, speed, steering wheel rotation and NASA-TLX. Stress induced by other road-users will also be studied by studying changes in rear-view mirror glance-frequency with and without vehicles behind.
One hypothesis regarding the effects of ISA is that the drivers will drive slower and in a more relaxed way, thus reducing the workload induced by the driving task. In order to test this hypothesis, 25 test-subjects will drive an instrumented vehicle on a predetermined route. The route consists of both urban and rural environment of varying complexity. In total, the test-drives will be carried out three times, before using ISA, after using it for a short period and finally after one year driving with ISA.
During the test-drive the drivers will carry out a secondary task called “peripheral dot detection”. The task consists of responding to two lights, one on each side of the driver, by pressing one of two buttons, one for each light. The lights will be lit for 0.75 seconds and the response time, missed responses and left / right errors will be registered.
In addition to the secondary task a number of other indicators of workload will be used such as lane position, speed, steering wheel rotation and NASA-TLX. Stress induced by other road-users will also be studied by studying changes in rear-view mirror glance-frequency with and without vehicles behind.
Department/s
Publishing year
2000
Language
English
Document type
Conference paper
Topic
- Infrastructure Engineering
Conference name
13th CTCT workshop
Conference date
2000-10-05
Status
Published