Calibration of Advanced Driver-Assistance Systems on Modified Vehicles

This research report focuses on the calibration of advanced driver-assistance systems (ADASs) in modified vehicles, specifically addressing how alterations in vehicle ride height and rake angle can impact ADAS performance. The report outlines the objectives of reviewing existing literature and technical experiences related to these modifications. It identifies potential consequences on the functionality of ADAS features such as advanced emergency braking and lane keep assist when vehicle specifications deviate from manufacturer standards. The research involved a comprehensive literature review, which revealed that changes in ride height can affect sensor orientation and, consequently, the timing and effectiveness of ADAS warnings and actions. The report also discusses the importance of recalibrating ADAS after modifications to ensure performance remains consistent with baseline conditions. Interviews with stakeholders provided additional insights into the effects of ride-height changes and aftermarket accessories on ADAS functionality. Recommendations for policymakers and regulators in New Zealand are included based on the findings.