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Table 5 shows how the entire mileage breaks down into each of four pavement-width classes, each subdivided into traffic-volume groups. Table 6 shows an accumulative distribution which gives for each traffic-volume class the total mileage at present improved with pavements or surfaces less than 18, 20, 22, and 24 feet wide, and 24 feet wide and over. In both tables roads included in the proposed interregional system and those not included in that system are separately classified.

Both tables 5 and 6 show that the roads of the strategic network most seriously deficient in pavement width are the 5,090 miles paved less than 18 feet wide. Only 934 miles of such extremely narrow surfaces are part of the interregional system; 4,156 miles are on other roads conforming to the strategic main lines.

Table 5 shows that pavements 24 feet wide and wider are found on 8,285 miles of the network—on 3,894 miles of the interregional system and on 4,391 miles of other roads. Practically all roads in this group are fully adequate in pavement width for their present normal traffic.