Optimizing Traffic Count Program
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Optimizing Traffic Count Program
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Author : Nicholas J. Garber
language : en
Publisher:
Release Date : 1984
Optimizing Traffic Count Program written by Nicholas J. Garber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Traffic estimation categories.
Estimates of annual average daily traffic (AADT) volumes are important in the planning and operations of state highway departments. These estimates are used in the planning of new construction and improvements of existing facilities, and, in some cases, in the allocation of maintenance funds. It is, therefore, important that any method used in obtaining the estimates provide data of sufficient accuracy for the intended use. This importance of having reliable and current data on traffic volumes at hand is generally recognized, and over the years data collection programs have tended to expand. This expansion has ledto huge amounts of money being spent annually for the collection and analysis of traffic data. Renewed efforts are, however, now being made to reduce the annual expenditure on traffic counts while at the same time maintaining the desired level of accuracy. A study is, therefore, being carried out by the Council to develop an optimal counting program for the state. This interim report presents the results of that portion of the study in which the feasibility of estimating AADT volumes from short counts was established. The procedure was first to use 1980 data for 16 continuous count stations to determine periods that are stable throughout the year for different short counts. It was found that stable periods for short counts occurred mainly on Mondays, Tuesdays, and Wednesdays, and expansion factors were then developed for short counts of different durations and different starting times for these days. The expansion factors were then used to estimate 1981AADT's from short counts extracted from data obtained in 1981 continuous counts. The results indicate that relative errors of less than 10% were obtained for AADT's estimated from counts of 6-, 8-, 10-, and 12-hour durations on Mondays, Tuesdays, and Wednesdays-The results for Tuesdays and Wednesdays tended to be more accurate than those for Mondays, and counts taken between February and November tended to give more accurate results than those taken in January and December.
Optimizing Traffic Counting Procedures
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Author : Nicholas J. Garber
language : en
Publisher:
Release Date : 1986
Optimizing Traffic Counting Procedures written by Nicholas J. Garber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Traffic estimation categories.
Estimates of annual average daily traffic volumes are important in the planning and operations of state highway departments. These estimates are used in the planning of new construction and improvement of existing facilities, and, in some cases, in the allocation of maintenance funds. It is, therefore, important that any method used in obtaining the estimates provide data of sufficient accuracy for the intended use. This importance of having reliable and current data on traffic volumes at hand is generally recognized, and over the years data collection programs have tended to expand. This expansion has led to huge amounts of money being spent annually for the collection and analysis of traffic data. Efforts are, however, now being made to reduce the annual expenditure on traffic counts while at the same time maintaining the desired level of accuracy. A study was, therefore, carried out by the Council to develop an optimal counting program for the state. Firstly, the study entailed breaking down all highways in the primary system into homogeneous links such that the traffic characteristics along any given link were constant. A total of 2,510 links were obtained. The links in each district were then grouped into clusters, such that the links within a given cluster had similar traffic volume characteristics. The McQueen's K-means Method was used in the grouping procedure. A total of 82 clusters were obtained. A counting procedure was then developed based on an accuracy level of ± 10% with 95% confidence. Counting stations were then randomly selected. The counting program developed requires 927 counting stations for the whole state compared with the 1,345 currently being used.
Analysis Of Routine Traffic Count Stations To Optimize Locations And Frequency
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Author : S. C. Shah
language : en
Publisher:
Release Date : 1981
Analysis Of Routine Traffic Count Stations To Optimize Locations And Frequency written by S. C. Shah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Traffic estimation categories.
This report describes a grouping of statewide permanent and key traffic counters on the basis of their geographic variations in traffic flow. Several factors were considered including the distance between clusters and urban versus rural areas. Traffic counts for a 3-year period were grouped into clusters by highway functional class for each individual parish. A computer program examines the maximum distance within a cluster and the maximum, average, and minimum distances within and between clusters. Count stations are arranged in clusters or groups of comparatively like counts. The cluster groups were examined by reviewing Louisiana parish maps that show the station locations. A computerized cluster analysis of all districts for 1977-1979 was reviewed according to highway functional classes 6, 7, and 8.
Optimization Of Large Traffic Systems
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Author :
language : en
Publisher:
Release Date : 1977
Optimization Of Large Traffic Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Automobiles categories.
Addendum To Final Report Optimizing Traffic Counting Procedures
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Author : Nicholas J. Garber
language : en
Publisher:
Release Date : 1987
Addendum To Final Report Optimizing Traffic Counting Procedures written by Nicholas J. Garber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Traffic estimation categories.
The methodology described in entry 55-14 was used with 1980 data for 16 continuous count stations to determine periods that were stable throughout the year for different short counts. It was found that stable periods for short counts occurred mainly on Mondays, Tuesdays, and Wednesdays, and expansion factors were then developed for short counts of different durations and different starting times for these days. The expansion factors were then used to estimate 1981 AADT's from short counts extracted from data obtained in 1981 continuous counts. The results indicated that relative errors of less than 10% were obtained for AADT's estimated from counts of 6-, 8-, 10-, and 12-hour durations on Mondays, Tuesdays, and Wednesdays. As described in entry 55-15, the overall study entailed breaking down all highways in the primary system into homogeneous links such that the traffic characteristics along any given link were constant. The links in each district were then grouped into clusters such that the links within a given cluster had similar traffic volume characteristics. A counting procedure was then developed based on an accuracy level of ± 10% with 95% confidence. Counting stations were then randomly selected. Entry 55-17 revised some of the data in the final report.
Guide For Traffic Volume Counting Manual
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Author :
language : en
Publisher:
Release Date : 1970
Guide For Traffic Volume Counting Manual written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Traffic flow categories.
Traffic Simulation And Data
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Author : Winnie Daamen
language : en
Publisher: CRC Press
Release Date : 2014-09-17
Traffic Simulation And Data written by Winnie Daamen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-17 with Mathematics categories.
A single source of information for researchers and professionals, Traffic Simulation and Data: Validation Methods and Applications offers a complete overview of traffic data collection, state estimation, calibration and validation for traffic modelling and simulation. It derives from the Multitude Project—a European Cost Action project that incorporates work packages defining traffic simulation practice and research; highway and network modeling; and synthesis, dissemination, and training. This book addresses the calibration and validation of traffic models, and introduces necessary frameworks and techniques. It also includes viable methods for sensitivity analyses, and incorporates relevant tools for application. The book begins with a brief summary of various data collection techniques that can be applied to collect different data types. It then showcases various data processing and enhancement techniques for improving the quality of collected data. It also introduces the techniques according to the type of estimation, for example microscopic data enhancement, traffic state estimation, feature extraction and parameter identification techniques, and origin–destination matrix estimation. The material discusses the measures of performance, data error and goodness of fit, and optimization algorithms. It also contains the sensitivity analyses of parameters in traffic models. Describes the various tasks of calibration and validation Considers the best use of available data Presents the sensitivity analysis method Discusses typical issues of data error in transportation system data and how these errors can impact simulation results Details various methodologies for data collection, sensitivity analysis, calibration, and validation Examines benefits that result from the application of these methods Traffic Simulation and Data: Validation Methods and Applications serves as a key resource for transport engineers and planners, researchers, and graduate students in transport engineering and planning.
Traffic Count Management Program
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Author : Regional Planning Commission, Jefferson, Orleans, St. Bernard and St. Tammany Parishes
language : en
Publisher:
Release Date : 1991
Traffic Count Management Program written by Regional Planning Commission, Jefferson, Orleans, St. Bernard and St. Tammany Parishes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Traffic engineering categories.
Review Of The Department S Traffic Count Program
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Author : John DiRenzo
language : en
Publisher:
Release Date : 1983
Review Of The Department S Traffic Count Program written by John DiRenzo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Highway departments categories.
Manual Of Instructions For The Statewide Traffic Count Program
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Author : South Dakota. Department of Highways. Research and Planning Division
language : en
Publisher:
Release Date : 1970
Manual Of Instructions For The Statewide Traffic Count Program written by South Dakota. Department of Highways. Research and Planning Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Traffic flow categories.