Speed-flow modeling of arterial roads in Singapore
- Nanyang Technological Univ. (Singapore). Center for Transportation Studies
Traffic volume and travel time data collected at a number of arterial roads in Singapore were used to analyze the speed-flow relationships for radial and ring arterial roads. A new travel time-density model was formulated by incorporating minimum delay per intersection and frequency of intersections per kilometer as model parameters. The appropriate values of these model parameters also were established. The adjusted R{sup 2} value of this model was higher than those for the journey speed-density and running speed-density relationships. The free-flow speed and maximum flow values of the travel time-density model also fitted favorably well with field data compared with those of the journey-speed models. The radial road capacity estimates range from 835 passenger cars per hour per lane (pc/h/l) for segments with uncoordinated (unlinked) traffic signals to 905 pc/h/l for segments with proper signal (linked) coordination. Not much difference in estimated capacities is observed between linked and unlinked segments for ring roads. The capacity estimate for arterial roads is 890 pc/h/l.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 289971
- Journal Information:
- Journal of Transportation Engineering, Journal Name: Journal of Transportation Engineering Journal Issue: 3 Vol. 124; ISSN JTPEDI; ISSN 0733-947X
- Country of Publication:
- United States
- Language:
- English
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