Determine the peak hour percentages in terms of the percentage of total daily traffic that is occurring in the AM/PM peak hour for both the peak hours. The percentages are intended to be a representation of the existing traffic patterns. Typically, traffic counts are collected in the form of TMCs and/or tube/camera counts. Assuming traffic counts are taken on a typical weekday with no major events or disruptions, they represent peak hour percentages for the AM and PM K factors. The peak hour percentages are then applied to the ADT to develop projected AM and PM peak hour volumes. Validate the traffic counts collected against STARS data, previous counts, or traffic forecasts. Please note that AM and PM peak hours are not always inversely related.

Turning movement traffic projections are estimated by applying existing turning movement count percentages at each approach to the ADT volumes. The TMCs are typically rounded to 50-vehicle increments, to avoid an overestimation of traffic on side streets. Traffic projections are then balanced along the corridor.