行前路徑選擇行為對路網車流影響之評估

Impact of Pre-trip Route Choice Behavior on Network Flows Distribution

交通資訊系統目前正逐漸受到國內外的重視，因此有關交通資訊系統對路網的影響分析有其必要性；交通資訊系統中又以行前交通資訊可能對路網車流產生的影響最大。本文先就駕駛人與交通資訊之互動關你以及路徑控制策略加以探討，並利用多項羅吉特模式為基礎，推衍出單一最佳、隨機、羅吉特等三種不同行前路徑選擇模式。本研究利用一虛擬的測試路網與台中市實際之道路路網，應用模擬指派軟體DYNASMART'評估在提供行前交通資訊狀況下，行前路徑選擇模式及需求因子之不同情境組合下對於路網績效的影響。由模模實驗的結果顯示，就路徑控制策略而言，單一路徑的提供可能提供較佳績效；就路徑選擇而言，單一最佳路徑選擇模式具最佳績效。

Pre-trip information systems, as part of Advanced Traveler Information systems, have tremendous accomplishments and web-based traffic information systems have been developed around the world. Thus it is necessary to study the possible impact of pre-trip information systems on network traffic flows. ln this paper, the interaction between different types of information and vehicles are first discussed, followed by a detailed discussion ofpossible route control strategies. The notion ofthe logit based route choice model is used to make different route choice behavior assumptions. The simulation-assignment model, DYNASMART, “used to investigate different route choice behavior and traffic loading, based on a test network and a Taichung network. The results indicate that single optimal route choice model could provide better system performance than the other two.