Effects of sleep schedules on commercial motor vehicle driver performance: Executive summary

The shortage and aging of drivers are not problems limited to the truck industry, but are common in the broader commercial motor vehicle (CMV) industry of Korea. This study investigates the relationships between work situation, work–family conflict, depression, and work engagement of taxi, bus, and truck drivers. We extracted 512 CMV drivers from the 5th Korea Working Conditions Survey. A structural equation model (SEM) was used to investigate the impact of a work situation or work–family conflict on depression and work engagement. Results showed that 38.9% of all respondents had symptoms of depression. In the SEM, a poor work situation (standardized path coefficient = 0.250) and work–family conflict (0.117) significantly affected depression. ‘Enough time’ and ‘feeling well’ were influential variables of work situation. ‘Responsibility’ and ‘concentration’ were influential variables of work–family conflict. Additionally, depression affected work engagement (0.524). ‘Vigor’ and ‘dedication’ were influential variables of work engagement. These results show that the relationships between work situation, work–family conflict, depression, and work engagement of CMV drivers are intricately linked.

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Auditory Icons as Impending Collision System Warning Signals in Commercial Motor Vehicles

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/154193129804201515 ◽

1998 ◽

Vol 42 (15) ◽

pp. 1127-1131 ◽

Cited By ~ 4

Author(s):

Steven M. Belz ◽

Gary S. Robinson ◽

John G. Casali

Keyword(s):

Motor Vehicle ◽

Visual Display ◽

Motor Vehicles ◽

Collision System ◽

Collision Warning ◽

Multiple Modalities ◽

Driver Performance ◽

Driving Task ◽

Side Collision ◽

Simulated Driving Task

This simulator-based study examined the use of conventional auditory warnings (tonal, non-verbal sounds) and auditory icons (representational, non-verbal sounds), alone and in combination with a dash-mounted visual display to warn commercial motor vehicle operators of impending front-to-rear and side collision situations. Driver performance was measured in the simulated driving task via brake response time in the front-to-rear collision scenarios and via a count of accident occurrence in the side collision scenarios. For both front-to-rear and side collision scenarios, auditory icons elicited significantly improved driver performance over conventional auditory warnings. Driver performance improved when collision warning information was presented through multiple modalities.

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