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In order to improve the product development efficiency, nowadays, the usage of simulation tools has become almost mandatory. The number of different settings, tested during the suspension tuning, for example, can grow reasonably in the same amount of time. Such a situation would be impossible experimentally. In this context, this work presents a truck model carried out in a multi-body environment (Adams) in order to evaluate aspects of vehicle ride comfort. The model was created with all project information available. Typical tracks, used for ride subjective evaluation, are modeled as track profiles and added to the multi-body model. The model is then validated against experimental data. The measurement setup used as well as the test conditions are fully detailed, as well as the comparison of the data acquire with the simulation results. Once with the validated model, it can be explored in order to extract all information required for a robust project.

Nighttime driving behavior differs from that during the day because of differences in the driver's field of view. At night, drivers must rely on their vehicle headlamps to illuminate the roadway. It is essential then that the driver is able to see the environment and road conditions in front of him. This paper presents the needs of the driver's (car and truck) due to the environment and road conditions from the state of Sao Paulo (Brazil). A survey has been done to compare the needs from the truck and car driver under different road conditions. The results show the necessity to tailor the beam pattern according to the driver needs, providing safer nighttime driving according to the driver's and market needs.