Physical considerations
The physical considerations of the heavy vehicle cab and seating and the characteristics of the driver population
will also play a role in design of the automation driver-vehicle interface. As shown in Fig. 1a, truck cab instrument
panels are already much more crowded with controls and displays than a typical passenger car, and often these fleet
vehicles include supplemental systems for fleet operations, creating competition for both real estate and driver
attention. Transit buses can be even more constrained, with even less adjustability of the driver seating position, and
when combined with drivers in the upper end of the population size range, often wearing heavy or bulky clothing,
there can be unexpected design concerns. As an example, typically, the automation of the steering function would
allow the driver to override the system by applying torque to the steering wheel. However, as shown in Fig. 1b,
when the automation turns the steering wheel, it’s possible that the resistance of the steering wheel rubbing against
the driver’s clothing could be sensed as an intentional override causing the system to disengage. This problem can
be further complicated when driver’s typical duties include tasks that require extreme reaches or when the
combination of vehicle suspension and operating characteristics (such as rough terrain) makedriver body contact
Physical considerationsThe physical considerations of the heavy vehicle cab and seating and the characteristics of the driver populationwill also play a role in design of the automation driver-vehicle interface. As shown in Fig. 1a, truck cab instrumentpanels are already much more crowded with controls and displays than a typical passenger car, and often these fleetvehicles include supplemental systems for fleet operations, creating competition for both real estate and driverattention. Transit buses can be even more constrained, with even less adjustability of the driver seating position, andwhen combined with drivers in the upper end of the population size range, often wearing heavy or bulky clothing,there can be unexpected design concerns. As an example, typically, the automation of the steering function wouldallow the driver to override the system by applying torque to the steering wheel. However, as shown in Fig. 1b,when the automation turns the steering wheel, it’s possible that the resistance of the steering wheel rubbing againstthe driver’s clothing could be sensed as an intentional override causing the system to disengage. This problem canbe further complicated when driver’s typical duties include tasks that require extreme reaches or when thecombination of vehicle suspension and operating characteristics (such as rough terrain) makedriver body contact
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