Author: Conrad Louis Dudek
Publisher:
ISBN:
Category :
Languages : en
Pages : 420
Book Description
This dissertation was concerned with a study of operational controls on urban freeways. An analysis was made of the inbound Gulf Freeway to define the operational problems resulting from vehicular incidents. It was found that significant congestion, delay, and stoppage waves frequently occur on the inbound Gulf Freeway because of the reduction in capacity caused by incidents on the main-lanes. Approximately 80 percent of the incidents reduce the inbound freeway capacity by one-half or more; about 13 incidents per week occur in the study section Monday through Friday from 6 a.m. to 7 p.m. A design concept of a prototype was formulated to increase freeway efficiency by alerting motorists to stoppage waves on freeway sections such as overpasses having restricted sight distances. The prototype was referred to as a safety warning system. It is anticipated that the improved efficiency will result in fewer accidents; reduced system travel time, driver anxiety, and driver discomfort; and improvement in the level of service. Several design alternatives were evaluated. A control technique utilizing critical energy as a parameter was developed and its application to digital computer control of the prototype was investigated. Evaluations were made of the performance, reliability, stability, and sensitivity of the system using a one-lane criterion for control. ...
A study of freeway operational controls
Author: Conrad Louis Dudek
Publisher:
ISBN:
Category :
Languages : en
Pages : 420
Book Description
This dissertation was concerned with a study of operational controls on urban freeways. An analysis was made of the inbound Gulf Freeway to define the operational problems resulting from vehicular incidents. It was found that significant congestion, delay, and stoppage waves frequently occur on the inbound Gulf Freeway because of the reduction in capacity caused by incidents on the main-lanes. Approximately 80 percent of the incidents reduce the inbound freeway capacity by one-half or more; about 13 incidents per week occur in the study section Monday through Friday from 6 a.m. to 7 p.m. A design concept of a prototype was formulated to increase freeway efficiency by alerting motorists to stoppage waves on freeway sections such as overpasses having restricted sight distances. The prototype was referred to as a safety warning system. It is anticipated that the improved efficiency will result in fewer accidents; reduced system travel time, driver anxiety, and driver discomfort; and improvement in the level of service. Several design alternatives were evaluated. A control technique utilizing critical energy as a parameter was developed and its application to digital computer control of the prototype was investigated. Evaluations were made of the performance, reliability, stability, and sensitivity of the system using a one-lane criterion for control. ...
Publisher:
ISBN:
Category :
Languages : en
Pages : 420
Book Description
This dissertation was concerned with a study of operational controls on urban freeways. An analysis was made of the inbound Gulf Freeway to define the operational problems resulting from vehicular incidents. It was found that significant congestion, delay, and stoppage waves frequently occur on the inbound Gulf Freeway because of the reduction in capacity caused by incidents on the main-lanes. Approximately 80 percent of the incidents reduce the inbound freeway capacity by one-half or more; about 13 incidents per week occur in the study section Monday through Friday from 6 a.m. to 7 p.m. A design concept of a prototype was formulated to increase freeway efficiency by alerting motorists to stoppage waves on freeway sections such as overpasses having restricted sight distances. The prototype was referred to as a safety warning system. It is anticipated that the improved efficiency will result in fewer accidents; reduced system travel time, driver anxiety, and driver discomfort; and improvement in the level of service. Several design alternatives were evaluated. A control technique utilizing critical energy as a parameter was developed and its application to digital computer control of the prototype was investigated. Evaluations were made of the performance, reliability, stability, and sensitivity of the system using a one-lane criterion for control. ...
Freeway Operations Study - Phase III
Author: Jin J. Wang
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 338
Book Description
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 338
Book Description
Urban Freeway Surveillance and Control
Author: Paul F. Everall
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 190
Book Description
Describes freeway conditions which are subject to improvement by means of electronic surveillance and control. Ramp metering is presented along with a benefit-cost analysis of its effectiveness.
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 190
Book Description
Describes freeway conditions which are subject to improvement by means of electronic surveillance and control. Ramp metering is presented along with a benefit-cost analysis of its effectiveness.
An Inventory of Freeway Surveillance and Operational Control Activities
Author:
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 38
Book Description
Inventory forms were prepared and tested by the Freeway Operations Committee of the Department of Traffic and Operations of the Highway Research Board, and transmitted to all state highway departments and to various toll facility authorities. A digest and summation are presented of inventory items for 20-25 agencies reporting some form of freeway surveillance and operational control activities. The digest is presented as reported by states. Tables are presented with inventory data tabulated by: (1) method of traffic data acquisition, telemetry and processing, (2) technique of traffic surveillance, (3) type of operational controls, (4) type of motorist aid, and (5) availability of material and technical reports.
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 38
Book Description
Inventory forms were prepared and tested by the Freeway Operations Committee of the Department of Traffic and Operations of the Highway Research Board, and transmitted to all state highway departments and to various toll facility authorities. A digest and summation are presented of inventory items for 20-25 agencies reporting some form of freeway surveillance and operational control activities. The digest is presented as reported by states. Tables are presented with inventory data tabulated by: (1) method of traffic data acquisition, telemetry and processing, (2) technique of traffic surveillance, (3) type of operational controls, (4) type of motorist aid, and (5) availability of material and technical reports.
Freeway operations study
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
Book Description
Freeway operations study
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
A Study and Control Strategy of Freeway Operations on Interstate 71, Columbus, Ohio
Author: David R. Howarth
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 260
Book Description
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 260
Book Description
Freeway Operation and Surveillance Project
Author: Jack E. Eckhardt
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 54
Book Description
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 54
Book Description
Highway Research & Development Studies
Author: United States. Bureau of Public Roads. Office of Research and Development
Publisher:
ISBN:
Category :
Languages : en
Pages : 178
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 178
Book Description
Evaluation of the Operational Effects of an "on-freeway" Control System
Author: Joseph A. Wattleworth
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 61
Book Description
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 61
Book Description