Improving Manual Counts of Turning Traffic Volumes at Road Junctions
Publication: Journal of Transportation Engineering
Volume 113, Issue 3
Abstract
Turning traffic volume data gathered manually at four intersections have been studied to determine if either Fratar, Furness, or Kruithof models could be used to design labor‐saving strategies for manual counts of traffic flows at road junctions and to detect observation errors in a given data set. Each model was used to recompute the observed turning volumes by using different abstractions of the original data as model inputs. The standard errors obtained correlate partly with the level of traffic flow and the magnitude of error‐inducing features at the observation sites. The results indicate that the models could be applied to obtain an indication of the magnitudes of observation errors in given data sets. It is also demonstrated that the models can be used to design a labor‐saving observation strategy for T‐intersections in all cases and for fourlegged intersections when reliable historical data exist. The Kruithof model was found to give the least errors, and it generally entails the fewest calculations.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Baerwald, J. E. (1976). Transportation and traffic engineering handbook, published for ITE, Prentice‐Hall, Inc., Englewood Cliffs, N.J.
2.
Buehler, M. G. (1983). “Forecasting intersection traffic volumes.” J. of Transp. Engrg., ASCE, 109(4), 519–533.
3.
Furness, K. P. (1965). “Time function iteration.” Traffic Engrg. and Control, 7(7), London, England, 458–460.
4.
Hauer, E. P., and Shin, B. T. (1981). “Estimation of turning flows from automatic counts.” Transp. Res. Rec. 795, 1–7.
5.
Jeffreys, M., and Norman, M. (1977). “On finding realistic turning flows at road junctions.” Traffic Engrg. and Control, 18(1), London, England, 19–21, 25.
6.
Kruithof, J. (1937). “Calculation of telephone traffic.” De Ingeniuer, 52(8).
7.
Marshall, M. L. (1979). “Labour‐saving methods for counting traffic movements at three‐ and four‐arm junctions.” Traffic Engrg. and Control, 20(4), London, England, 159–162.
8.
Mekky, A. (1979). “On estimating of turning flows on a junction.” Traffic Engrg. and Control, 20(12), London, England486–489.
9.
Norman, M., and Hoffman, N. (1979). “Non‐iterative methods for generating a realistic turning flow matrix for a junction.” Traffic Engrg. and Control, 20(12), London, England, 587–589.
10.
Van Zuylen, H. J. (1979). “The estimation of turning flows on a junction.” Traffic Engrg. and Control, 20(11), London, England, 539–541.
Information & Authors
Information
Published In
Copyright
Copyright © 1987 ASCE.
History
Published online: Mar 1, 1987
Published in print: Mar 1987
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.