Traffic control systems (TCSs) are an emerging focus area among transportation technologies. More than 55,435 TCS technologies were patented during the last decade, and researchers, policy makers, and decision makers are increasingly interested in turning TCSs into safe and environmentally friendly transportation realities. This article analyzes all TCS-related patents issued during the period of 2009?2018 to provide an overview of TCS technological developments during this period. To this end, we analyzed all TCS patents filed under the G08G1 International Patent Classification (IPC) code and identified trends and growth in national distribution, subfields, and applicants. We also reported on various countries? areas of TCS technology specialization.

中文翻译：

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道路车辆交通控制系统技术：专利分析

交通控制系统（TCS）是交通技术中新兴的焦点领域。在过去的十年中，超过55,435种TCS技术获得了专利，研究人员，政策制定者和决策者越来越有兴趣将TCS转变为安全和环保的运输现实。本文分析了2009-2018年期间发布的所有与TCS相关的专利，以概述此期间TCS技术的发展。为此，我们分析了根据G08G1国际专利分类（IPC）代码提交的所有TCS专利，并确定了国家分布，子领域和申请人的趋势和增长。我们还报道了各个国家？TCS技术专业领域。