This paper argues for the introduction of a mainline rail-oriented performance metric for driver-replacing on-board perception systems. Perception at the head of a train is divided into several subfunctions. This article presents a preliminary submetric for the obstacle detection subfunction. To the best of the author's knowledge, no other such proposal for obstacle detection exists. A set of submetrics for the subfunctions should facilitate the comparison of perception systems among each other and guide the measurement of human driver performance. It should also be useful for a standardized prediction of the number of accidents for a given perception system in a given operational design domain. In particular, for the proposal of the obstacle detection submetric, the professional readership is invited to provide their feedback and quantitative information to the author. The analysis results of the feedback will be published separately later.

翻译：本文主张引入一种面向干线铁路的司机替代型车载感知系统性能指标。列车头部的感知功能可分解为若干子功能。本文提出了障碍物检测子功能的初步子指标。据作者所知，目前尚无此类针对障碍物检测的指标提案。通过建立子功能的子指标集，可促进不同感知系统之间的相互比较，并指导人类驾驶员性能的测量。该指标集亦有助于在特定运行设计域内，对给定感知系统的事故数量进行标准化预测。特别是针对障碍物检测子指标的提案，诚邀专业读者向作者提供反馈意见与量化信息。反馈分析结果将另行发表。