Percent Traffic in the Primary Direction

Return Home, to  RSAP-V3 Wiki

Percent Traffic in the Primary Direction

Percent of traffic in the primary direction  is similar to the traffic engineering concept of directional distribution of traffic.   Given an undivided highway with an ADT  of 10,000 vpd, with baseline  stationing that runs from the south to the north (i.e., northbound is the primary direction) and where 6,000 vpd travel south, the percent of traffic in the Primary Direction equals 40.   That is, 6,000/10,000=60 percent of the vehicles are traveling south.   North is the direction of the baseline stationing so north is the Primary Direction so 100% - 60% = 40 percent of the vehicles are traveling in the Primary Direction.   For one-way streets  and Divided Highways on separate alignments, 100 percent of the vehicles travel in the Primary Direction.    The RSAPv3 default  for divided and Undivided Highways is 50%.

<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal;mso-pagination:none;mso-layout-grid-align:none;text-autospace:none">