Abstract
The objective of the present research was to determine the impact on the driver's work of TPM and EPT in trucks. The aim was to establish the extent to which the physical and mental partial strains are reduced by the devices and what importance they have with regard to the overall strain on the driver. The following three-stage project design was used as a basis: (1) a survey (using questionnaires) among truck drivers who either use or do not use the devices mentioned above to estimate their stress and strain situation; (2) field tests on a suitable, clearly defined stretch of road with and without TPM; and (3) field tests with EPT and with conventional transmission.