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A Introduction 3 a General Comments
Trends Relating to Highway Development I2 Z Comparison of Rural Highway Mileage
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accidents amount annual areas average axle axle load bond issue Bureau of Highway Chapter Chicago cities classiﬁcation construction Cook County counties county highway deﬁciencies deﬁnite Division of Highways engineering estimates extensions ﬁgures ﬁnancing ﬁrst flat weight funds grade separation highway agencies highway costs highway facilities highway purposes Highway Research highway system highway transportation highway users horsepower improvement increase lane lllinois highways load maintenance major thoroughfares ment miles per hour motor fuel tax motor vehicle license municipal streets needs operation parking passenger cars pavement percentage period population primary highways primary system property taxes Public Roads Administration road districts road system roads and streets routes rural highways rural roads shown in Table speciﬁc speed state-aid roads state-aid system surface survey tion toll roads township trafﬁc traffic volume traﬂic trucks and busses Unincorporated areas urban width