并描述了将双向交通流分解为单向交通流进行推算的过程，给出了通道OD递推公式和相应条件。
The procedures to divide bi-directional flows into two single directional flows are discussed. The formulae for OD flow calculation are derived.
并描述了将双向交通流分解为单向交通流进行推算的过程，给出了通道OD递推公式和相应条件。
The procedures to divide bi-directional flows into two single directional flows are discussed. The formulae for OD flow calculation are derived.
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