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Heavy trucks are produced with a great variety of vehicle configurations, operate over a wide range of gross vehicle weight and sometimes function in extreme duty environments. Frontal crashes of heavy trucks can pose a threat to truck occupants when the vehicle strikes another large object such as bridge works, large natural features or another heavy-duty vehicle. Investigations of heavy truck frontal crashes indicate that the factors listed above all affect the outcome for the driver and the resulting damage to the truck Recently, a new chassis was introduced for on-highway heavy truck models that feature frontal airbag occupant protection. This introduction presented an opportunity to incorporate the knowledge gained from crash investigation into the process for developing the crash sensor's parameter settings.

This paper discusses one method for reducing heavy-duty truck rollover accidents, the Freightliner/MeritorWABCO Roll Advisor and Control (RA&C) System. It describes the operation of this system and the unique way in which RA&C trains drivers to avoid high-risk rollover and braking conditions. In addition, the rationale for this approach is discussed in terms of Behavioral Based Safety (BBS), and the means employed to communicate with drivers is described. A technical description of the RA&C system is presented including a discussion of the challenges of designing and developing this product to be a cost-effective system readily implemented in today's commercial vehicles. Resolution of these challenges leads to the choice of the ABS platform to house and operate the necessary electronics and software along with the Freightliner Driver Message Center for displaying driver information.

Sterling, a new brand name in the trucking industry, wanted to develop a competitive medium duty product. The Sterling cab is versatile and can be adapted to meet target market needs. However, the Sterling chassis is heavy and expensive for medium and light-heavy applications. Freightliner chassis components provide a more versatile platform. The Sterling cab and Freightliner chassis provided the starting point for development of a new product called ACTERRA. Sterling's need for this product required an aggressive development plan. Although timing was critical, other major project targets were desired, including low cab height, good visibility, maneuverability, low cost, product flexibility, and attractive appearance with strong ties to a Sterling family identity. The result is an attractive and competitive package delivered to the market in minimum time. This paper summarizes the product content and project approach taken to launch ACTERRA.