協同智慧運輸車聯網 (C-ITS) 透過車輛、基礎設施和行人之間的協作提升所有道路使用者的出行便利性和舒適度。 本篇論文著重在台灣交通環境的中小街廓帶來的獨特挑戰，並提出符合臺灣協同智慧運輸車聯網路側設施資通訊開放標準 (TCROS) 的通信框架。 TCROS 基於 SAE J2735 和 J2945 等國際公認標準，提供本地化的調整和定義，以滿足台灣交通環境的要求。 本論文透過實際C-ITS系統測試小街廓場景對C-ITS應用的潛在影響，特別是TCROS協議中路側設備（Road-side unit, RSU）與車側設備（On-board unit, OBU）在小街廓的路口時，可能因為車速、車輛與路口距離等不同情況，而對C-ITS應用造成影響，進而影響道路安全。本論文針對號誌搶佔與優先應用（Preemption and Prioritization Signal Application, PPSA）測試不同小街廓的設定，量測整體系統運行的時間，並提出即時回覆的通訊機制（Timely Response），以促進PPSA應用在小街廓道路上運行時的安全性。通過解決小街廓的挑戰並結合本地化調整，我們的目標是提高台灣協同智慧運輸車聯網的性能和有效性，為所有道路使用者促進更安全、更高效的交通。

Cooperative Intelligent Transport Systems (C-ITS) have revolutionized the collaboration between vehicles, infrastructure, and pedestrians, aiming to enhance travel convenience and comfort for all road users. We focus on the challenge posed by Small Street Blocks in Taiwan's traffic environment and propose a communication framework compliant with the Taiwan C-ITS Roadside Open Standards (TCROS). The TCROS, based on internationally accepted standards such as SAE J2735 and J2945, provides localized adjustments and definitions to address the specific requirements of Taiwan. We emphasize the need to consider Small Street Block scenarios and their impacts on the implementation of Preemption and Prioritization Signal Application (PPSA). It emphasizes the importance of efficient and reliable communication between Roadside Units (RSUs) and On-Board Units (OBUs) of the TCROS protocol. A communication mechanism called timely response is proposed as a crucial component to facilitate standardized coordination processes and optimize communication performance so as to facilitate the traffic safety. By addressing the challenges of Small Street Blocks and incorporating localized adjustments, we hope that our experimental results and analyses can help facilitate the deployment of TCROS on the areas with small street blocks.

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