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Dynamic Traffic Modelling Of The I 25 Hov Corridor
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Book Synopsis Dynamic Traffic Modeling of the I-25/HOV Corridor Southeast of Denver by : Bruce Janson
Download or read book Dynamic Traffic Modeling of the I-25/HOV Corridor Southeast of Denver written by Bruce Janson and published by . This book was released on 1995 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic modeling is one means of being able to predict time-varying traffic conditions in an urban roadway network support traveler information systems and traffic management advisories. The development and testing of DYMOD (a dynamic traffic assignment model) was implemented in the Denver metro area to predict observed volumes and speeds during a typical weekday peak period (5am - 10am). On average, predicted flows agreed to within 12% of actual 5-minute volumes on I-25 through lanes at the detector locations. DYMOD was also able to model incident conditions to generate route diversion planning strategies during lane blocking accidents to estimate vehicle hours of delay.
Book Synopsis Dynamic Traffic Modelling of the I-25/HOV Corridor by : Bruce N. Janson
Download or read book Dynamic Traffic Modelling of the I-25/HOV Corridor written by Bruce N. Janson and published by . This book was released on 1995 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic modelling is one means of being able to predict time-varying traffic conditions in an urban roadway network to support traveler information systems and traffic management advisories. The development and testing of DYMOD (a dynamic traffic assignment model) was implemented in the Denver metro area to predict observed volumes and speeds during a typical weekday peak period (5am - 10am). On average, predicted flows agreed to within 12% of actual 5-minute volumes on I-25 through lanes at the detector locations. DYMOD was also able to model incident conditions to generate route diversion planning strategies during lane blocking accidents and to estimate vehicle hours of delay.
Download or read book Transportation Research Record written by and published by . This book was released on 2004 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Ramp Meter Effectiveness for Wisconsin Freeways by :
Download or read book Evaluation of Ramp Meter Effectiveness for Wisconsin Freeways written by and published by . This book was released on 2004 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation of 12 High Geosynthetic Reinforced Retaining Walls Under Surcharge Loading by Centrifuge Testing by : James M. Klamerus
Download or read book Simulation of 12 High Geosynthetic Reinforced Retaining Walls Under Surcharge Loading by Centrifuge Testing written by James M. Klamerus and published by . This book was released on 1998 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirteen centrifuge model tests on geosynthetic reinforced retaining walls were conducted. These tests were designed to determine the effects of backfill type, reinforcement shape (length), and degree of saturation on displacement and mode of failure under surcharge loading. The backfill types are sand, silty clay, recycled asphalt, and sand-clay materials. Material analysis for the sand and clay soils is obtained.
Book Synopsis Modeling Hurricane Evacuation Traffic by : Haoqiang Fu
Download or read book Modeling Hurricane Evacuation Traffic written by Haoqiang Fu and published by . This book was released on 2006 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Little attention has been given to estimating dynamic travel demand in transportation planning in the past. However, when factors influencing travel are changing significantly over time - such as with an approaching hurricane - dynamic demand and the resulting variation in traffic flow on the network become important. In this study, dynamic travel demand models for hurricane evacuation were developed with two methodologies: survival analysis and sequential choice model. Using survival analysis, the time before evacuation from a pending hurricane is modeled with those that do not evacuate considered as censored observations. A Cox proportional hazards regression model with time-dependent variables and a Piecewise Exponential model were estimated. In the sequential choice model, the decision to evacuate in the face of an oncoming hurricane is considered as a series of binary choices over time. A sequential logit model and a sequential complementary log-log model were developed. Each model is capable of predicting the probability of a household evacuating at each time period before hurricane landfall as a function of the household's socio-economic characteristics, the characteristics of the hurricane (such as distance to the storm), and policy decisions (such as the issuing of evacuation orders). Three datasets were used in this study. They were data from southwest Louisiana collected following Hurricane Andrew, data from South Carolina collected following Hurricane Floyd, and stated preference survey data collected from the New Orleans area. Based on the analysis, the sequential logit model was found to be the best alternative for modeling dynamic travel demand for hurricane evacuation. The sequential logit model produces predictions which are superior to those of the current evacuation participation rate models with response curves. Transfer of the sequential logit model estimated on the Floyd data to the Andrew data demonstrated that the sequential logit model is capable of estimating dynamic travel demand in a different environment than the one in which it was estimated with reasonable accuracy. However, more study is required on the transferability of models of this type, as well as the development of procedures that would allow the updating of transferred model parameters to better reflect local evacuation behavior.
Book Synopsis Travel Demand Forecasting, Travel Behavior Analysis, Time-sensitive Transportation, and Traffic Assignment Methods by : National Research Council (U.S.). Transportation Research Board
Download or read book Travel Demand Forecasting, Travel Behavior Analysis, Time-sensitive Transportation, and Traffic Assignment Methods written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1995 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Performance of Accelerated Rigid Pavements, Project CXMP 13-0006-07 by : Ardani Ahmad
Download or read book Long-term Performance of Accelerated Rigid Pavements, Project CXMP 13-0006-07 written by Ardani Ahmad and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the post-construction evaluation of the fast track pavement in Sterling, Colorado. The field evaluation consisted of visual inspection, fault measurement, profile measurement and distress survey. A set of falling weight deflectometer (FWD) measurements was also acquired to assess the structural responses and to evaluate load transfer efficiency between the slabs. The results of this study demonstrated that fast track concrete can be as durable as the conventional concrete pavement. After seven years of being in service the pavement has shown no sign of fatigue, only some minor distresses unrelated to fast track techniques.
Book Synopsis I-76 Truck Study by : David A. Price
Download or read book I-76 Truck Study written by David A. Price and published by . This book was released on 1998 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portions of the driving lane on I-76 located in the Colorado Department of Transportation's (CDOT's) Region 4 are seriously distressed. To help prolong the life of the Portland Cement Concrete Pavement Region 4 has placed signs advising truckers to use the passing lane between Roggen and the Nebraska state line [approximately 140 miles (225 km)]. A test section well within the signed test area advising the truckers to use the passing lane and a control section just prior to the signed area were established and evaluated over a four year period. Roughness data taken with an Ames Profilograph, slab faulting measured with a Georgia fault meter, and overall physical pavement distress were noted and used as a comparison between driving lane and passing lane within the two sections.
Book Synopsis Long-term Field Performance of Geosynthetic-reinforced Soil Retaining Walls by : Phillip E. Crouse
Download or read book Long-term Field Performance of Geosynthetic-reinforced Soil Retaining Walls written by Phillip E. Crouse and published by . This book was released on 1996 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 1997 HBP QC for Pay Pilot Projects with Void Acceptance by : Bud A. Brakey
Download or read book 1997 HBP QC for Pay Pilot Projects with Void Acceptance written by Bud A. Brakey and published by . This book was released on 1998 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot Bituminous Pavement QC&QA Projects Constructed in 1996 Under QPM 2 Specifications by : Bud A. Brakey
Download or read book Hot Bituminous Pavement QC&QA Projects Constructed in 1996 Under QPM 2 Specifications written by Bud A. Brakey and published by . This book was released on 1997 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents Tables and Figures which summarize the HBP Quality Level Analysis (QLA) for projects completed in 1996, the second season using the latest significant revision to the specifications. The quality Level (QL) for the elements (sieve analysis, asphalt content, and pavement density) and the item composites are summarized. While QL determines Pay Factor (PF), it is also used to rank contractors' performance. The item QL improved 1.3 percentage points in 1996 over 1995. But the incentive/disincentive payments were not sufficient to cause some of the contractors to improve their process control. Both, the better and porrer performing contractors show up with similar rankings from year to year. The QLA specifications essentially are serving satisfactorily. Implementation: The PF formulas were modified for the 1997 season so as to make the pF continuous in relation to the QL, rather than in steps as has been the procedure. It is suggested the methods of applying weight factors to the element QL's for PF calculations be reviewed for possible changes. Some other changes in the specification and computer software are needed.
Book Synopsis Avalanche Forecasting Methods, Highway 550 by :
Download or read book Avalanche Forecasting Methods, Highway 550 written by and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 33-mile segment of US Highway 550 has a greater avalanche hazard than aU other Colorado highways combined. A total of 95 avalanche paths intersect the highway with an avalanche hazard of 443. More than 70 encounters between avalanches and vehicle. and six fatalities have occurred since 1950. The objective of this research project is to develop a methodology for calculating the severity of a particular avalanche activity. The project is not intended to develop a "black box" type of computer program for avalanche forecasting. Instead, it is intending to investigate parameters that may be important in forecasting on Highway 550, and to suggest how they may be used to forecast avalanches in the future
Book Synopsis HBP Pilot Void Acceptance Projects Completed in 1993-1996 by : Bud A. Brakey
Download or read book HBP Pilot Void Acceptance Projects Completed in 1993-1996 written by Bud A. Brakey and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1993, the Colorado Department of Transportation (CDOT) recognized that specifying HBP volumetric properties would likely provide superior pavements. A long range goal was set for acceptance to be based on voids properties. Beginning in 1993, a series of void acceptance (VA) pilot projects were let to contract; by the end of 1996, nine had been completed. Six had conventional mix designs. The last three were designed using Superpave technology. The data for the nine VA projects are summarized and compared with data from concurrent CDOT projects under Quality Level Analysis (QLA).
Book Synopsis Avalanche Detection Using Atmospheric Infrasound by : A. J. Bedard
Download or read book Avalanche Detection Using Atmospheric Infrasound written by A. J. Bedard and published by . This book was released on 1997 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the phenomena that snow avalanches produce sounds in the 0.5 to 5.0 Hertz range. It also documents testing of an infrasound detection system to detect snow avalanches in the southwest mountains of Colorado. Two infrasound sensors were installed so the direction of the sound could be determined by comparing the phasing and arrival times. Avalanche detection was sometime obscured because of the high mountains nearby diverting the sound and causing clear-air turbulence. Linking sound events with avalanche events was hampered by the fact that the time of actual avalanches could only be determined within a 12-hour period.
Book Synopsis Application of Traffic Simulation Models by :
Download or read book Application of Traffic Simulation Models written by and published by . This book was released on 1982 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ground Access Assessment of North American Airport Locations by : Lawrence Francis Cunningham
Download or read book Ground Access Assessment of North American Airport Locations written by Lawrence Francis Cunningham and published by . This book was released on 1996 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
