Five variations of a special safety belt system were installed in General Services Administration cars loaned to Federal employees for business trips. The important feature was an interlock device which prevented the starting motor from operating unless the safety belts were fastened. If the belts were unfastened once the engine started, a flashing light and in some systems a buzzer also would be activated. The interlock/alarm was connected to the appropriate belts and included the light-buzzer combination as follows: System 1 - Lap belt and warning light; System 2 - Lap belt, warning light, warning buzzer; System 3 - Lap belt, shoulder belt, warning light; System 4 - Lap belt, shoulder belt, warning light, warning buzzer; System 5 - Special three point belt with inertial shoulder harness, warning light, warning buzzer. Acceptance of the interlock systems was determined by having a dispatcher give the drivers an explanatory memorandum and a questionnaire designed to assess his reactions to the interlock system. The results indicated no significant difference in acceptance between any of the five systems. Overall, there was a large proportion of drivers who stated they would accept an interlock type, safety belt system. Even more encouraging was the finding that a large proportion of drivers who have low safety belt usage in their private cars (less than 50 percent) expressed a positive attitude towards the interlock system. (Author)
An Evaluation of a Safety Belt Interlock System
1971
24 pages
Report
No indication
English
Safety Belt Interlock System: Usage Survey
NTIS | 1975
|The 1974 Toyota Belt Interlock System
SAE Technical Papers | 1974
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