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2. Measuring critical gap;Hewitt;Transp. Sci.,1983
3. Useful estimation procedures for critical gaps;Brilon;Transp. Res. Part A: Policy Practice,1999
4. Capacity at Unsignalized Intersections Derived by Conflict Technique;Brilon;Transp. Res. Rec. J. Transp. Res. Board,2001
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