Its motion direction is compared with the direction defined by the referenced motion direction field, which results in whether it is a crossing pedestrian.

依据参考方向场分析其轨迹的走向，以确定运动目标是否发生跨道行为。

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He said when he first joined the MTA in 1982, the agency mounted an aggressive campaign to try to stop people from crossing between cars while trains were in motion, because of the number of riders who slipped and fell beneath the wheels.

WSJ: Subway-Push Prevention Solution Would Be Very Costly for the MTA