連續跟進行為下非號誌化路口延滯模式之研究

On the Delay Model ofUnsignalized Intersections under Continuous Move-up Operations

傳統非號誌化路口之容量與延滯模式乃根據幹道具有行車優先權之前提而發展，但近期之研究指出由於支道駕駛人連續跟進行為之存在，使得現有之容量與延滯模式無法適切反應真正之路口運行特性。根據觀察，國內非號誌化路口亦普遍存在連續跟進之跟車現象，故本研究針對連續跟進行為發展適用之延滯模式，並在台北市選擇五處具有代表性之路口，以錄影方式調查分析並驗證比較各種延滯模式之適用性。依據實證結果發現，本研究所發展的模式較符合國內之行車特性，傳統延滯模式將高估丈道延滯，並低估幹道延滯。

Conventional capacity & de1ay models of unsignalized intersections are developed on the premise that major street vehic1es have higher priority. Recent studies have found that these mode1s might not well reflect the real-world situation, due to the existence of continuous move-up behavior. It has been observed that such behavior does exist in domestic cities. The major purpose of this study is, therefore, to develop more appropriate models, taking into account the effects of move-up operations. Pield traffic data are collected and analyzed from five typical intersections in Taipei. A de1ay mode1 is developed and validated based on these data, and is compared with conventional models. It is conc1uded that the proposed model may describe the real operational characteristics betler while conventional models tend to overestimate the delay of minor street vehic1es and underestimate delay of major street vehic1es.