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Standards Development
The primary objective of this document is to define standard methods to measure three-dimensional relationships between road vehicle foot controls and the enclosing structures such as the floor, sidewalls and lower instrument panel. This standard provides methods for the design or the competitive assessment of the layout, spacing, and clearances between foot controls and their surrounding components. It will include terms and definitions encountered in the design, development and evaluation of foot controls, in both static and dynamic use. This standard also provides guidelines to create requirements for the three-dimensional space between, above, below, and to the side of a foot control system, including use-cases and factors that influence the design of foot controls, such as foot position and foot size based on vehicle type, environmental considerations, and differences between Heavy Trucks and Buses, and Passenger Cars, Sports Utility Vehicles and Light Trucks. This document will include but not be limited to lateral spacing of foot controls (ISO 3409), and will address several deficiencies in ISO 3409, including a modern format with definitions and external references. An addendum will also outline dynamic usability considerations both for manual and semi-autonomous driving, such as the differences between dynamic and static heel points, heel-toe, misapplication, simultaneous push A-B pedals, the effect of driver anthropometry, driver positioning geometry, and design considerations for entry / exit as a function of vehicle type. This standard assumes foot controls of different types for controlling different functions, corresponding both to what exists and will come.
The purpose of this standard measurement practice is to provide a common, comprehensive set of reference dimensions and methods for the design and evaluation of foot controls based on best practices across the industry. In current practice, foot control design and evaluation is performed by each OEM, but a comprehensive international standard to measure their three-dimensional relationship to the vehicle environment does not exist. This standardization will support national regulations, including analysis related to functional safety. Additionally, this modern and more complete standard will address recent SR ballot comments to Revise/Amend ISO 3409
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