The Highway Capacity Manual' indicates that the saturation flow rate of an approach can be calculated by determining the average headway between vehicles as they travel through an intersection. It is generally accepted that under ideal conditions, vehicles will travel at an average headway of 2.0 seconds, resulting in a saturation flow rate of 1,800 vehicles per hour per lane. The latest update of the HCM suggests that an ideal saturation flow rate of 1,900 vehicles per hour is a more realis tic average due to changes in vehicle length and driver behavior.'
Previous studies have documented saturation flow rates at intersections ranging from 1,500 to almost 2,500 pas senger cars per hour of green per lane been attributed to many factors.
The (pcphgpl). The variation in rates has
major factors include:
The Highway Capacity Manual' indicates that the saturation flow rate of an approach can be calculated by determining the average headway between vehicles as they travel through an intersection. It is generally accepted that under ideal conditions, vehicles will travel at an average headway of 2.0 seconds, resulting in a saturation flow rate of 1,800 vehicles per hour per lane. The latest update of the HCM suggests that an ideal saturation flow rate of 1,900 vehicles per hour is a more realis tic average due to changes in vehicle length and driver behavior.'Previous studies have documented saturation flow rates at intersections ranging from 1,500 to almost 2,500 pas senger cars per hour of green per lane been attributed to many factors. The (pcphgpl). The variation in rates hasmajor factors include:
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