Infrastructure systems in the US are in urgent need of maintenance and rehabilitation. According to the most recent factsheet published by the American Society of Civil Engineers, one of the top five infrastructure concerns of today in the US is the transportation system. The major challenge facing maintenance managers in state Departments of Transportation (DOTs) today is to preserve the road ...

After years of use, there’s oil loss on the asphalt pavement. bond strength aggregate decreases. Loose threshing is serious. In order to improve pavement performance, Extend service life pavement, Improve safety aircraft operation. We test AC-20 modified mixture taxiway and runway Chang Sha Airport from many factors, including raw materials, admixtures, gradation design, optimum ratio stone, th...

This paper presents a study investigating the potential use of human motion intensities as input for parametric urban design. Through a computer vision analysis of thermal images, motion intensity maps are generated and utilized as design drivers for urban design patterns; and, through a case study of a town square, human occupancy and motion intensities are used to generate situated flow topol...

According to the characteristics of airport pavement traffic, we discuss a method of building an airport pavement traffic model which is based on CPN theory and simulate a practical situation as well. The method overcomes the shortage of modelling with normal Petri Net theory, solves the difficult problems of airport pavement traffic such as complex traffic nets, frequent road changing, etc., r...

The paper describes some recent developments in the application of lower bound shakedown analysis to geotechnical problems. The theoretical basis of shakedown analysis is briefly reviewed along with the necessary finite element and optimization procedures. In terms of applications, the primary focus is on pavement design which is discussed in some detail.

A: INTRODUCTION The Wisconsin Transportation Technology Transfer Center (Transportation Information Center) has developed a roadway management program for Wisconsin local agencies. This system has been developed in cooperation with local road agency associations and the Wisconsin Department of Transportation. Wisconsin's pavement management system has evolved from a basically paper system devel...

The paper presents results of sensitivity analysis to crack propagation of a pavement bituminous layered structure using the Finite Element Method (FEM) and Artificial Neural Networks (ANN). The performed preliminary study determined stresses and displacements in the pavement layer system. The pavement structure consisting of asphalt layers, a base layer, subbase and subgrade layers was analyze...

ABSTRACT In the new Brazilian mechanistic-empirical design method of asphalt pavements, MeDiNa, characterization permanent deformation (PD) for selection soils and gravel is based on tests performed with at least 150,000 loading cycles each nine specimens indicated in DNIT standard. Despite providing information about material behavior under a wide range testing conditions, experimental program...

The state of Victoria in Australia has many major roads assets. These roads, stretching about 196,000 in km, have to be maintained and managed by VicRoads, the road authority of Victoria[1], and the local councils. Pavement Management Services (PMS) [2] company was employed by VicRoads in 2002/3 to do the analysis and detection of the pavement cracking in Victoria. PMS uses up to five industria...