loop ramp的用法和樣例：
例句
- Whenever a long queue is detected at the metered ramp, the signaltiming should be adjusted to reduce the traffic flows entering the ramp.
當管匝道上排隊較長時，系統將通過自動調整來減少進入匝道的車流量，以保證匝道控制系統的有效性，避免匝道排隊過長，減少高速公路癱瘓的可能性。 - The decomposition and coordination methods applied to large system design are used for coordinated ramp metering on freeways.
摘要採用大系統分解和協調的方法研究高速公路多匝道的協調控制問題。
