自行車速度與橫向間距影響因素之探討

Abstract

本研究探討自行車專用道上之自行車騎士自身因素（性別、年紀、有無配戴安全帽、是否雙人共同騎乘、是否併騎）與外在環境因素（自行車道寬度、自行車道分隔類型、鄰近車道汽車與機車數），影響自行車速率及車道左側間距之關係。研究利用實地錄影觀察的方式，觀察騎士在自行車專用道上之橫向間距，同時運用雷射測速槍測得該駕駛者之行駛速率。結果發現自行車騎士的性別、年齡、有無配戴安全帽、雙騎，對自行車騎士速度行為上皆有顯著差異，而不同車道寬度與車道分隔類型、鄰近車道有無汽機車經過亦對專用道上自行車騎士的橫向位置有著顯著差異。研究進一歩驗證，車道越寬，自行車騎士左側所保持之橫向間距越大；在同樣車道寬度之下，自行車行駛於實體分隔類型相較行駛於標線分隔類型，所保持之左側橫向間距顯著較大；且自行車顯著地會受到鄰近車道機車數與汽車數影響而維持其橫向間距。但前述外在環境因素對於自行車速率並無統計上的顯著影響。

This study aims to examine the factors affecting the cyclists’ riding behaviors on the bikeway. Speed of the cyclists as well as the left lateral clearance kept by the cyclists is measured as the indicating variables. Numbers of passing cars and motorcycles at the neighboring lane are also considered. It is firstly found that there is a significant difference between the cycling speed and all characteristics of the cyclists, namely gender, age, helmet wearing, and double riding. However, parallel cycling is not a significant factor influencing cycling speed. Secondly, there is a significant difference between all external environmental factors and the lateral clearance kept by the cyclists. The environmental factors include width and division type of the bikeways. The wider the bikeway is, the greater the left lateral clearance will be kept by the cyclist. When riding on the bikeway with same width, cyclists tend to maintain a greater left lateral clearance on the bikeway with barrier separation than with marking separation. Furthermore, the number of neighboring cars and motorcycles is found to have a significant impact on the lateral clearance kept by the cyclists. Nevertheless, no significant statistical evidence of the external environmental factors affecting cycling speed is found.