ISO 21202:2020 pdf download

ISO 21202:2020 pdf download.Intelligent transport systems — Partially automated lane change systems (PALS) — Functional / operational requirements and test procedures
1 Scope
This document contains the basic control strategy, minimum functionality requirements, basic driver interface elements, minimum requirements for reaction to failure, and performance test procedures for PALS. PALS perform part or all of lane change tasks under the driver’s initiation and supervision. PALS are intended to function on roads with visible lane markings, where non-motorized vehicles and pedestrians are prohibited (e.g. access controlled highway), and to perform a lane change into a lane with traffic moving in the same direction. Support on sections of roadway with temporary or irregular lane markings (such as roadwork zones) is not within the scope of this document. This document does not describe functionalities based on combinations with longitudinal control systems such as those standardized in ISO 22839 (FVCMS) or ISO 15622 (ACC). The driver always assumes responsibility for this system and the driver’s decisions and operations take priority at all times. Use of PALS is intended for light-duty and heavy-duty vehicles (heavy trucks and buses). This document does not address any functional or performance requirements for detection sensors, nor any communication links for co-operative solutions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 15037-1, Road vehicles — Vehicle dynamics test methods — Part 1: General conditions for passenger cars
ISO 15037-2, Road vehicles — Vehicle dynamics test methods — Part 2: General conditions for heavy vehicles and buses
ISO 17387, Intelligent transport systems — Lane change decision aid systems (LCDAS) — Performance requirements and test procedures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
5.1 General
PALS are classified into two types by different tasks split between system and driver as shown in 5.1.1, and 5.1.2, and by a modified sequence of operations. In both types, the lane change manoeuvre is initiated and supervised by the driver and is terminated when the SV is brought totally inside the target lane. In Type I systems, the driver intends to promptly change the lane as the driver evaluates the target lane to be free and the PALS receive a driver command to perform the lane change manoeuvre. The system performs the lane change unless it detects an adjacent vehicle that obstructs the lane change. In Type II systems, the driver intends to change the lane as soon as a sufficient gap in the target lane becomes available. The driver authorizes the system to search for a sufficient gap and then to perform a lane change manoeuvre.