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| GLOSSARY of Road Traffic Analysis Terms |
| [ 作者： | 来源： | 时间：2006-1-21 1:28:03 ] |
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Effective Intersection Capacity
An aggregate measure of intersection capacity determined as the ratio of total intersection demand flow to the intersection degree of saturation, where the intersection degree of saturation is the largest lane degree of saturation considering all lanes of the intersection.
End Gain
Duration of the interval between the end of the displayed green period and the end of the effective green period for a movement. This is used in signal timing and performance analysis to allow for additional departures after the end of green period.
Equivalent Stop Value
Value of a deceleration-acceleration cycle in terms of a major stop-start cycle. See Major Stop.
Exclusive Pedestrian Phase
The phase at an intersection during which all pedestrian displays are green and all vehicle displays are red, allowing all pedestrian movements to operate simultaneously while all vehicle movements are stopped. Also see Scramble-Crossing Phase.
Exclusive Lane
A lane (or length of lane) allocated for use only by a particular movement or a type of vehicle, e.g. left-turn lane, through lane, right-turn lane, bus lane, as opposed to a Shared Lane.
Filter Turn
A turning movement that must give way to and find safe gaps in conflicting (opposing) vehicle or pedestrian traffic before proceeding, e.g. filter right-turn, slip-lane left turn, left turn on red. Also see Opposed Movement.
Fixed-Time Control
A signal control method that allows for only a fixed sequence and fixed duration of displays.
Flow Rate
Number of vehicles or pedestrians per unit time passing (arriving or departing) a given reference point.
Flow Ratio
The ratio of arrival (demand) flow rate to saturation flow rate. |
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