1. Statistical analysis of speed-density hypotheses;Drake;Highway Res. Rec.,1967
2. Traffic Flow Theory;Gerlough;Transportation Research Board Special Report 165,1975
3. A study of traffic capacity;Greenshields;Proc. Highway Res. Board,1934
4. Further analysis of the flow-concentration relationship;Hall;Transp. Res. Rec.,1986
5. Speeds and flows on an urban freeway: Some measurements and a hypothesis;Hurdle;Transp. Res. Rec.,1983