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Sound Ergonomics is an important attribute and differentiator among trucks, because professional truck drivers spend many hours of their work time on the road driving. Ergonomics affects areas of driver safety, comfort, accommodation and performance. The purpose of this paper is to showcase the ergonomic principles, tools and process that were applied throughout the development cycle of Freightliner's new Medium Duty Truck: Business Class M2. An important centerpiece of the ergonomic process at Freightliner is RAMSIS, a 3-D Digital Human Modeling software. It allows effective evaluation of ergonomic issues in the CAD environment early on in the development cycle, thus reducing the risk of expensive re-designs at later stages in the vehicle development process. Several examples with RAMSIS will highlight the benefits of applying 3-D human modeling to the design process.

This paper describes the ergonomics program at Freightliner and how it is integrated in the engineering and design process. It will also describe how we use advanced technologies such as 3-D Digital Human Modeling with RAMSIS and how these are applied to the design process to ensure optimized ergonomics in our trucks.

The purpose of this paper is to showcase the industrial design and ergonomic principles, tools and the processes that were concurrently applied throughout the development cycle of Thom”. Thomas Built Buses Engineering and Freightliner LLC Engineering groups worked interactively to optimize driver and passenger ergonomics, comfort and safety. Several examples are shown to highlight the benefits of applying 3-D human modeling to the design process. Resulting improvements of visibility, accommodation, and safety are shown.