【非選題】 一、實地觀察車流運行特性之流率(flow)、速率(speed)與密度(density)等三個參
數,可採用下列兩種方式:路點觀測(measurements at a point or observed short
length during long time)及時點觀測(measurements along a length by photography or
observed over long length during short time)。請分別敘述其作法,及其如何推估流
率(flow)、速率(speed)與密度(density)等三個參數。(20 分)