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4W <br />Regional Trends and the Existing Transportation System <br />Deficiency maps (labeled "2002 Volumes" and "2030 Volumes ") follow showing Average Daily <br />Traffic Volumes for 2002 and 2030 on the schematic highway network map as produced by the <br />Triangle Regional Model. Road segments on these maps are thicker or thinner according to the <br />total daily volume of traffic, and they are colored to indicate the relative degree of congestion <br />(ratio of traffic volume to road segment capacity). In general, when the Volume /Capacity ratio is <br />greater than 1.0, drivers will experience some periods of congestion that are great enough to <br />warrant changing departure time (leaving earlier or later) or re- routing the trip. At <br />Volume /Capacity ratios greater than 1.2, the road segment will typically be in a congested state <br />throughout the peak hour periods, and often outside the peak hours as well. <br />24 <br />