While other systems are used by park boards, progressive system appears to keep traffic moving in loop streets; outlying systems to be tied in; new traffic commission to correlate different systems now being formed for metropolitan area; three-light system is used; same office has control of two outlying systems now operating; getting traffic data; no parking allowed.
Chicago advocates progressive control system
Roads Streets
Roads and Streets ; 68 , n 1
1928
3 pages
2 Figs.
Article (Journal)
English
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