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Accident rates related to rural road geometry elements and daily traffic

Author: Skinner, DG Date: Feb 1994 The available data bases for accidents, road geometry (photolog output) and traffic counts were combined and the accident rates determined for two lane, four lane and six lane road categories as well as for 22 geometric element categories. ... Read more
Appropriate use of locally available materials in concrete, bituminous surfacings and layerworks for roads in rural areas

Author: Paige-Green, P ; Coetzer, K ; Lea, J ; Semmelink, C Date: 17 Jun 2009 The use of locally materials in low volume rural roads can result in significant cost savings. However, this is associated with an increased risk of premature distress or failure. A compromise needs to be found between the probability of ... Read more
Capacity of two-lane roads

Author: Kennedy, DA Date: Jan 1991 Relationships of speed vs density, volume and percentage loop occupation are investigated. The effect of differing directional splits in traffic volumes is also examined. A method of determining the Level-of Service of two-lane roads in terms ... Read more
Characterisation of the elastic properties of existing pavements : state of the art

Author: Sanders, PJ ; De Beer, Morris ; du Plessis, HW Date: 26 May 2009 Various aspects of the determinations and use of elastic moduli of pavements materials are herein addressed. Included is an investigation into the sensitivity of pavement life to changes in elastic material parameters, an update of moduli ... Read more
Equivalent damage of loads on pavements

Author: Prozzi, JA ; Sanders, PJ ; du Toit, GD ; De Beer, Morris Date: 26 May 2009 This report describes a new methodology for the determination of Equivalent Damage Factors (EDFs) of vehicles with multiple axle and wheel configurations on pavements. The basic premise of this new procedure is that "equivalent pavement ... Read more
Guidelines for upgrading of low volume roads

Author: Division of Roads and Transport Technology CSIR ; Jordaan & Joubert Inc. Date: Mar 1993 The purpose of this manual is to provide guidelines on the upgrading of gravel low volume roads to roads and maintenance personnel of road authorities of all sizes. Low volume is, for the purpose of this document, defined to be less than 500 ... Read more
Incorporating risk in the economic evaluation of road infrastructure projects

Author: Schutte, IC ; Williams, CJ ; Wood, DB Date: 26 May 2009 Decisions involving road infrastructure investment inevitably are based on various assumptions. This means that risk is inherent in these decisions. It is essential that this risk should be incorporated in the evalution process. This will ... Read more
Revised K21 : identification and improvement of hazardous locations

Author: Opperman, RA ; Upton, AH Date: 26 May 2009 The purpose of this manual is to provide a practical and easy-to-use method for identifying and prioritising hazardous locations in a given area, and to provide guidelines for establishing the most cost-effective remedial measure for a specific ... Read more
Subsurface drainage

Author: Van Der Merwe, CJ Date: Sep 1993 The report describes the findings of the research project on subsurface drainage. The need for drainage was quantified by evaluating HVS tests on wet pavements. Geotextiles were investigated and various tests performed. Soil/geotextile ... Read more
Towards successful SPP treatment of local materials for road building

Author: Paige-Green, P ; Coetser, K Date: 17 Jun 2009 This report discusses the use of certain proprietary soil stabilisers in low volume roads in South Africa. Although ionic soil stabilisers have been in use for many years, they have not been marketed to their fullest potential and in many ... Read more
Use of the DRTT K-mould to determine the elastic and shear properties of pavement materials

Author: Semmelink, CJ Date: 26 May 2009 This report briefly discusses the theoretical background of the K-mould, its development and the results obtained with it on a number of untreated road building materials. Read more

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Browsing by Subject "National Department of Transport"

Browsing by Subject "National Department of Transport"

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