3-D Road Design by Applying Differential Geometry and Conventional Design Ap...Basil Psarianos
油
3-D Road Design by relating Differential Geometry parameters with conventional road design parameters like horizontal and vertical curvature and superelevation rate
A compendium survey of International Access Management Practices and ConceptsBasil Psarianos
油
This document provides a summary of international access management practices and concepts from contributors in 5 countries. It finds that while transportation development has achieved high levels, not all have benefited equally. Death rates remain unacceptably high. The US has been a leader in developing and implementing access management concepts for over 30 years, but this is still an exception worldwide. Reasons for lack of access management utilization globally include lack of resources and failure to prioritize safety. An international access management primer is being developed by TRB to advance integration of access management principles globally.
Investigation of Vehicle Motion on sharp Horizontal Curves combined with stee...Basil Psarianos
油
There are safety concerns when sharp curves are combined with steep grades. The presentation shows the results on friction deficiencies resulting when vehicles accommodate such road sections
Trb 15 1578--Vehicle motion on sharp curves with steep gradesBasil Psarianos
油
This document summarizes research on evaluating vehicle safety on road sections with sharp curves and steep grades. Field tests were conducted measuring vehicle speed, acceleration and friction on an urban ring road in Athens. A multi-body vehicle model was used to simulate vehicle motion and determine safe speeds. The point mass model was found to underestimate friction requirements, especially on downgrades. Steep upgrades presented more critical conditions for impending skid. Further investigation of other vehicle types is needed to determine safe horizontal-vertical alignment combinations.
Perspectives of Implementing Automated and Robotics-based Techniques in Road ...Basil Psarianos
油
The document discusses implementing automated and robotics-based techniques (ART) for road infrastructure construction and maintenance operations in Europe. It identifies 25 specific operations as candidates for ART, including tasks like sweeping, emulsion spraying, and material placing for the paving operation. Each task is assessed for its suitability to ART based on hazard level, repetitiveness, difficulty, and other factors. A technological assessment of the ART components needed for the paving operation, such as kinematics, sensors and control systems, determines that some are at the product stage while others require further development or research.
Impact Assessment of Automated and Robotic-based Techniques in road constructionBasil Psarianos
油
This document discusses the impact assessment of using automated and robotic technologies in road construction and maintenance operations. It describes new scenarios that incorporate these automated and robotic-based technological systems (ART) for 25 common road infrastructure construction and maintenance operations. The assessment considers the direct impacts on five groups: road authorities, road constructors, the labor force, road users, and non-road users. It is concluded that road authorities and constructors could benefit in reduced costs, the labor force may face both better working conditions and fewer available jobs, and impacts on road users will vary depending on traffic conditions near work sites.
1. According to Greek design guidelines, the highest design speed for freeways is 120 km/h, but can be 130 km/h in flat areas.
2. In practice, calculations showed operating speeds on certain highways exceeded design speeds, with passenger cars reaching 144 km/h on tangents and 128 km/h on sharp curves.
3. There are inconsistencies between theoretical design speeds and actual operating speeds on Greek highways, with some highways having much higher speeds than design guidelines suggest.
Theoretical Investigation of accuracy of the Alignment Point Density/ Genauig...Basil Psarianos
油
A theoretical investigation of the surveying point density was carried out with the aim to determine the accuracy of the clothoid parameter "A" and the Circular Arc Radius "R" of an existing roadway. IN GERMAN
3-D Road Design by Applying Differential Geometry and Conventional Design Ap...Basil Psarianos
油
3-D Road Design by relating Differential Geometry parameters with conventional road design parameters like horizontal and vertical curvature and superelevation rate
A compendium survey of International Access Management Practices and ConceptsBasil Psarianos
油
This document provides a summary of international access management practices and concepts from contributors in 5 countries. It finds that while transportation development has achieved high levels, not all have benefited equally. Death rates remain unacceptably high. The US has been a leader in developing and implementing access management concepts for over 30 years, but this is still an exception worldwide. Reasons for lack of access management utilization globally include lack of resources and failure to prioritize safety. An international access management primer is being developed by TRB to advance integration of access management principles globally.
Investigation of Vehicle Motion on sharp Horizontal Curves combined with stee...Basil Psarianos
油
There are safety concerns when sharp curves are combined with steep grades. The presentation shows the results on friction deficiencies resulting when vehicles accommodate such road sections
Trb 15 1578--Vehicle motion on sharp curves with steep gradesBasil Psarianos
油
This document summarizes research on evaluating vehicle safety on road sections with sharp curves and steep grades. Field tests were conducted measuring vehicle speed, acceleration and friction on an urban ring road in Athens. A multi-body vehicle model was used to simulate vehicle motion and determine safe speeds. The point mass model was found to underestimate friction requirements, especially on downgrades. Steep upgrades presented more critical conditions for impending skid. Further investigation of other vehicle types is needed to determine safe horizontal-vertical alignment combinations.
Perspectives of Implementing Automated and Robotics-based Techniques in Road ...Basil Psarianos
油
The document discusses implementing automated and robotics-based techniques (ART) for road infrastructure construction and maintenance operations in Europe. It identifies 25 specific operations as candidates for ART, including tasks like sweeping, emulsion spraying, and material placing for the paving operation. Each task is assessed for its suitability to ART based on hazard level, repetitiveness, difficulty, and other factors. A technological assessment of the ART components needed for the paving operation, such as kinematics, sensors and control systems, determines that some are at the product stage while others require further development or research.
Impact Assessment of Automated and Robotic-based Techniques in road constructionBasil Psarianos
油
This document discusses the impact assessment of using automated and robotic technologies in road construction and maintenance operations. It describes new scenarios that incorporate these automated and robotic-based technological systems (ART) for 25 common road infrastructure construction and maintenance operations. The assessment considers the direct impacts on five groups: road authorities, road constructors, the labor force, road users, and non-road users. It is concluded that road authorities and constructors could benefit in reduced costs, the labor force may face both better working conditions and fewer available jobs, and impacts on road users will vary depending on traffic conditions near work sites.
1. According to Greek design guidelines, the highest design speed for freeways is 120 km/h, but can be 130 km/h in flat areas.
2. In practice, calculations showed operating speeds on certain highways exceeded design speeds, with passenger cars reaching 144 km/h on tangents and 128 km/h on sharp curves.
3. There are inconsistencies between theoretical design speeds and actual operating speeds on Greek highways, with some highways having much higher speeds than design guidelines suggest.
Theoretical Investigation of accuracy of the Alignment Point Density/ Genauig...Basil Psarianos
油
A theoretical investigation of the surveying point density was carried out with the aim to determine the accuracy of the clothoid parameter "A" and the Circular Arc Radius "R" of an existing roadway. IN GERMAN