Radar-based vehicle guidance using arrays of reflectors embedded in or under a road line on a driving surface

EP4705803A1Pending Publication Date: 2026-03-11VEHICLE RADAR GUIDANCE LLC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-05-04
Publication Date
2026-03-11

AI Technical Summary

Technical Problem

Current vehicle guidance systems on roadways lack effective solutions for precise lateral positioning and lane keeping, especially in adverse weather conditions and low-visibility environments, as they rely on traditional painted lines that may not provide reliable radar reflections.

Method used

An array of radar reflectors, specifically dihedral corner reflectors, are embedded in or under road lines to reflect radar signals laterally and upwardly, enabling vehicles equipped with radar transceivers to determine their lateral distance and maintain proper positioning through autonomous steering or driver assistance.

Benefits of technology

The solution provides reliable and accurate lateral vehicle guidance in various weather conditions and visibility scenarios, enhancing safety and precision by using radar-reflective road lines that can withstand environmental factors and maintain effective signal reflection.

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Abstract

An array of radar reflectors (e.g., dihedral corner reflectors (DCRs)) is arranged in and / or under a road line to reflect laterally incident radar signals laterally and upwardly back toward the signal source. The array can be used as a reflective target for a radar transceiver mounted on or in a vehicle. If the array is in or under a line marking the edge of a road or lane, and the radar transceiver is oriented to transmit a radar signal sideways from the vehicle and partially downward toward the line, then the reflections of the radar signal from the array can provide distance measurements between the transceiver and the array. Those distance measurements can be used either to guide the vehicle laterally autonomously or to assist a driver with lateral steering (global check, lane keeping assistance or lane departure warning).
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