We will be attending Traffex 99 Cindy Kerckhoffs Next Issue: Traffic Information Systems

Road Construction is the topic discussed in this month's magazine. Road Construction is a large and global topic out of which a number of different aspects will be dealt with. Amongst others you will find an article about "A new triaxial testing facility for large-scale testing of coarse aggregates" and a press release about "Low cost chemical additive for in-situ road base compacting and clay material stablization." If, after having read this magazine, you are interested in publishing an article in our magazine you can do so by sending the information to editor@mobility-net.com. These articles will then be included in the RCN Library (http://www.roadconstruction.com/). TRAFFEX 99 From April 20 through April 22 there is an exhibition in the National Exhibition Centre Birmingham, UK. Traffex 99, the 19th biennial International Traffic Engineering and Road Safety Exhibition (http://www.traffex.com/). This exhibition is set to be the international meeting place for over 10,000 decision makers involved in the design, management and maintenance of road traffic, road safety, parking systems, and related topics world-wide. The Urban Mobility Group is also attending this exhibition and I would be pleased to meet you. If you are interested in contacting us, please e-mail our marketing manager: A.Hartog@mobility-net.com or myself editor@mobility-net.com, to make an appointment.

Organizations In the previous issue, I mentioned that we were going to create a new organizations-database. This database has now been activated within the Urban Mobility Network. As mentioned, this database gives an overview of associations, centers and specialty societies worldwide. You can search the databases, by going to http://www.urbanmobility.net/, choose for one of the 5 active platforms and click on the button 'organizations' at the top of the screen. If your organization is not yet listed, please go to the organization database and complete the online form or send an e-mail to editor@mobility-net.com giving us your web site address. New Development: QWI-Net (Urban Mobility related search engine) Mobility Network Group is going to launch its own Search Engine (QWI-Net) in a couple of weeks. The most important difference from normal search engines, is that QWI-Net stands for: Qualified Web Information NETwork. Qualified because we explicitly want to involve you, the expert, in identifying the URL's to be added to the QWINET index. Furthermore we, the Mobility Network Group, i.e. the community manager responsible for adding the URL to QWINET, performs a last quality check before the individual Web pages are scheduled for indexing. You are invited to become part of the expert community building their own qualified mobility search engine. The latter through forwarding us the URL's of those Web sites you would like to see incorporated in QWINET (Your Favourites).

Editor: Cindy Kerckhoffs P.O. Box 917 Maastricht The Netherlands Tel: +31 43 321 30 22 Fax: +31 43 321 10 62 editor@mobility-net.com Published by: The Urban Mobility Network Group http://www.urbanmobility.net

Road Construction The BBA Assessment of SightGRIP Coloured Aggregate Plus... Forum and Mailinglist Ask the experts Press releases Internet links

... and Urban Mobility For other Urban Mobility related information: events, headlines, articles ... etc. visit the Urban Mobility Network platforms at: http://www.urbanmobility.net/

The BBA Assessment of SightGRIP Coloured Aggregate

by John C Bullas BSc MSc MIHT FGS as published in Highways & Transportation Foreword: Hoben Industrial Minerals has funded what is believed to be the first independent assessment of coloured high friction surfacing to measure colour change in addition to the traditional mechanical properties commonly quoted for such materials. As with any other material used on the highway, the engineer looks to define the relevant properties of a coloured surface in a non-subjective manner for tenders and specifications - this has been exceptionally difficult with colour retention: its perception is so dependant on the observer and the fact the changes such materials undergo when laid cannot be observed in a short length of time, make trial sites inappropriate as a precursor for projects needing materials in the following months rather than following years. By establishing a number of laboratory tests to rank the performance of coloured materials, potential equivalents of routinely specified existing tests to predict relative in-service performance for aggregates like the AAV (Aggregate Abrasion Value) and PSV (Polished Stone Value)- might be found to measure potential for in-service colour change. PSV is routinely used to rank materials resistance to polishing but with a complex traffic dependant relationship with in-service performance (as measured using the pendulum, SCRIM or Griptester). Perhaps the Delta E parameter for overall colour change may end up being a PSV for colour? At the very least a benchmark level of performance for coloured materials can now be established where nothing exists at present. The Engineer must remember... the long-term performance of coloured materials cannot be predicted by their as-laid appearance! The BBA Assessment Report Hoben Industrial Minerals sought the advice of TRL, the British Board of Agrèment (BBA) and the Paint Research Association when considering an appropriate test programme, the valuable advice they received led to the tests being carried out by the BBA as a Product Assessment (using ASTM, BS and TRL tests) with the tests chosen to closely reflect the processes acting upon SightGRIP as-laid. The BBA Product Assessment compares the relative performance of SightGRIP, a non-SightGRIP red coated calcined bauxite (Product A) and a red coloured high-friction thermoplastic material (Product B). SightGRIP is manufactured by coating a graded calcined bauxite aggregate with a coloured epoxy resin binder. Fig 1 illustrates a typical SightGRIP application. Colour measurement methods Colour measurement methods have been used in the pigment industry for many years to measure colour in terms of colour co-ordinates in "colour space" (Fig 2): the industry standard method- (Centre International d'Eclarage L,A,B method: CIELAB 19767) expresses overall colour change in terms of Delta E7 (the bigger the value the greater the colour change). This method measures changes in both the base colour and the intensity of that colour and is commonly used for both quality control and performance monitoring. Other earlier methods do exist to measure colour (the XYZ and Yxy methods) these were also used by the BBA to measure the colour in the course of their work should this information be needed at a later date. Tests Carried out: Samples of Red SightGRIP, a Non-SightGRIP red coated bauxite (both laid with a proprietary red polyurethane binder and prepared by Hoben Industrial Minerals using facilities at the BBA and Colas's laboratory in Rowfant) and a red coloured high friction thermoplastic (applied by screed box on site by a contractor) were tested for the effects of Scuffingl and Wear2 (samples prepared on asphalt slabs in accordance with TRL Report 176 15.10.96 Draft). Red SightGRIP was also tested for the effects of freeze-thaw3 and diesel exposure4 (assessed using the Scuffing Test after pre-conditioning). The Wear Test and the Scuffing Test (along with the diesel and freeze-thaw pre-conditioning) were developed by TRL for subsequent incorporation after further revision into the HAPAS (Highways Authorities Product Approval Scheme) for high-friction systems. Note: A HAPAS Assessment was not carried out on SightGRIP as Hoben Industrial Minerals Ltd is a manufacturer of high friction and other coloured aggregates (system components) rather than an installer of and/or manufacturer of a complete high-friction system. A standard UV test (ASTM G53-96)5 and a standard salt spray resistance test (BS 3900: Pt F12 )6 were also carried out on the full range of SightGRIP colours along with samples of Products A & B. Samples for both these tests were prepared on metal plates (150x75mm aluminum for the UV tests and 150x100mm stainless steel for the salt spray). Red coated bauxite's (SightGRIP and Product A) were mounted using the proprietary red PU binder, the remaining SightGRIP colours were mounted using the same resin as was used to coat the calcined bauxite. *Click here to download the full article(cached)*

Forum This forum gives you the opportunity to ask questions and participate in forum discussions with other urban mobility professionals. These discussions can be regarding the above articles, but can also include other Road Construction topics.

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Mailinglist: The Urban Mobility mailinglist give you the opportunity to send an e-mail to the mailinglist members whom are all professionals. If you would like to subscribe to the mailinglist, please go to Urban Mobility Network, click on one of the five platforms and click on the button 'mailinglist' at the top of the page.

Mr. John Bullas John Bullas is the SightGRIP Product Development Manager for Hoben Industrial Minerals Ltd (based in Brassington, Derbyshire, England. He has spent his whole career in highways related activities. Mr Bullas joined Hoben shortly after leaving the Transport Research Laboratory where he worked on projects relating laboratory determined aggregate properties to road performance as measured using SCRIMTEX, HRM and other devices. He joined (the then) TRRL after graduating from The University of Liverpool with an Honours Degree in Geology in 1987 and was awarded a Masters in Geotechnical Engineering from the University of Surrey in 1992 with a thesis based on his TRL research on the specification of "clean, hard and durable" aggregate for bitumen macadam roadbase. Living in the middle of the Derbyshire Peak District National Park, his marketing and development activities for Hoben Industrial Minerals take him to all areas of the UK and mainland Europe.

Dr. Douglas D. Gransberg, P.E. Dr. Douglas D. Gransberg, P.E. has been a member of the Texas Tech University College of Engineering Faculty since 1994. He received both his B.S. and M.S. degrees in Civil Engineering from Oregon State University. He received his Ph.D. from Somerset University. He is a registered Professional Engineer in Texas and Oregon and a Certified Cost Engineer. Before joining Texas Tech, he spent over twenty years as an engineer in the U.S. Army Corps of Engineers. His career consisted of a series of assignments of increasing responsibility in the United States and overseas. In his final posting, Dr. Gransberg was the Europe District's Area Engineer stationed in Ankara, Turkey. In this job, he was responsible for the management of over $200 million worth of construction and maintenance contracts in seven different countries. He pioneered the use of Design-Build contracting procedures to deliver facilities in remote locations.

Mr. P. Samuel Peter Samuel has spent over 30 years as a journalist writing on public policy issues. He has an honors degree in economics, and for the last several years has been specializing in reporting transport issues. He publishes a monthly TOLL ROADS NEWSLETTER which focusses on toll and other road pricing news. The focus is most heavily on dveelopments in North America but the newsletter has occasional reports from outside. Peter Samuel also writes for the Route One Publishing group in London UK and is published in ITS International and WORLD HIGHWAYS magazines. He has also produced occasional papers on transport issues for thinktanks in the US, notably the Cato Institute and the Reason Foundation.

HESS GMBH BAUMASCHINEN hess.baumaschinen@t-online.de http://www.hess-baumaschinen.de/ HESS GMBH BAUMASCHINEN, German dealer for VOEGELE and HAMM Road Construction Equipment is established since 1959 and located 70 KM northern Frankfurt/Main. Hess is specialized in worldwide exports of overhauled VOEGELE Asphalt Pavers. After the complete General Overhaul the Pavers are in nearly new condition and will be delivered with 6 month guarantee and 1 week operation training on job site. HESS is also dealer for the brand-new and innovative road building method ´Compact - Asphalt´. Contact HESS for more information.

FAHR Industries Inc. FAHRIndustries@hotmail.com http://www.nci1.com/fahr/ FAHR Industries is proud to have developed an economical and environmentally friendly product for the road construction / rehabilitation market, the FAHR ROADCRUSHER TM, FORESTER C-2000. The FAHR ROADCRUSHER is a "unique self-powered mobile road crusher" used primarily for forest road development and low volume or secondary road resurfacing. The FORESTER C-2000 can also be used to convert old railroad beds into bike/ped. pathways, other applications may exist.

Hoben Industrial Minerals limited Hoben Industrial Minerals limited manufactures SightGRIP - a leading coloured high-friction surface coating widely used in the UK including applications on the Red Route schemes in London. It is used for bus lanes, cycles lanes, traffic calming and demarcation. They supply some of the largest contracting companies in the UK and have links abroad with overseas specialists.

European Union Road Federation (ERF) - a branch of the International Road Federation (IRF) http://www.irfnet.org/ ERF calls for pro-road revisions to Trans European Network (TEN) guidelines Brussels - In a new Position Paper, the European Union Road Federation (ERF) says that the EU's guidelines on Trans European Networks (TENs) must be revised in a manner which emphasises the positive role played by road transport in Europe's transport modal mix. The ERF - the newly-created Brussels branch of the IRF - says it welcomes the recent announcement by the European Commission that it will revise its TENs guidelines. But the ERFstresses that the EU must change its approach and attitudes towards the contribution of road transport to the European transport system. "In our opinion, the current TEN guidelines do not adequately reflect real knowledge of how goods and passengers are transported across Europe," says José Papi, Head of the ERF branch. "This is because modal market shares and their different scales are not considered at all in the current guidelines. If the revisions we are calling for are accepted, then this will lead to the extension of the trans-European road network, something which will benefit all European citizens," stresses Mr Papi. In its Position Paper, the ERF has called for several revisions to the road transport sections of the TENS guidelines, including: the funding of projects only if they are economically viable competitive pricing between different transport modes enhanced references to road safety issues, greater emphasis on citizens' rights in relation to access to motorways development of a new section within the guidelines for a road traffic management and information network. The ERF was founded in late 1998 on the initiative of several leading National Road Associations. It aims to coordinate the views and concerns of Europe's road sector and to work with EU institutions in order to achieve a range of policies and programmes which will improve road networks, both in the EU and neighbouring countries. For more information see the Road Construction headlines ( http://www.roadconstruction.com/).

American Road & Transportation Builders Association (ARTBA) http://www.artba.org/ ARTBA helps secure exemption for off-road construction equipment Washington, D.C. [March 10, 1999] — The American Road and Transportation Builders Association (ARTBA) announced today that it has obtained official guidance for contractors from the Federal Highway Administration (FHWA) that Federal Motor Carrier Safety Regulations (FMCSRs) will not be expanded to cover off-road construction equipment. The association was concerned that construction equipment could be characterized as "commercial motor vehicles" because manufacturers are equipping the vehicles with safety features such as side mirrors, back-up lights, and other devices that are characteristic of commercial vehicles. Earlier guidance from FHWA stated that the regulations cover vehicles that are "designed for use on a public highway." "If construction equipment were to come under FMCSRs, operators would be required to comply with a myriad of federal regulations including holding commercial drivers’ licenses, subjection to hours of service regulations, and regulated drug and alcohol testing," said ARTBA President Pete Ruane. "This exemption could save a small to medium size contractor as much as $15,000 annually." ARTBA hired the Washington, D.C. office of law firm Jackson, Lewis, Schnitzler & Krupman in 1998 to resolve the matter. In a letter to ARTBA’s legal counsel dated February 17, 1999, Paul Brennan, Director of the Office of Motor Carrier Research and Standards, states " . . . such equipment is not within the contemplation of the FMCSR, and the Federal Highway Administration (FHWA) has no intention of regulating its use. [A] backhoe is still a backhoe, designed for digging, and even if you added designer plates, it would still be considered a backhoe." Ruane said ARTBA was also concerned that the use of construction vehicles on public roads for incidental purposes, such as carrying tools, moving construction supplies or other materials (e.g., sand or gravel in the bucket of a front end loader) would alter their classification as off-road vehicles, bringing the equipment under the FMCSRs. For more information see the Road Construction headlines (http://www.roadconstruction.com/).

Multi Market Trading. Low cost chemical additive for in-situ road base compaction and clay material stabilization (iso - 2500) PRODUCT DESCRIPTION: Our Road Soil Stabilizer, a ® product, is an Electro-chemical soil stabilizer used in the construction of all types of roads. By permanently altering the physical and mechanical characteristics of soils, it enables these materials to achieve and maintain acceptable densities after compaction. It is a true catalyst, 100% organic, non-toxic and poses no threat to groundwater supplies, flora or fauna. ADVANTAGES: Cost savings of up to 75% are achievable. One 210 litre drum treats 7 000 m2 or 1 050 m3 and is equivalent to 60-80 tons of alternate stabilizers. Enables far greater use of in-situ materials, minimizing the need for the importation of expensive "borrowpit" materials. No limited working time or curing period exists and it's speed and ease of application results in a more cost-effective production rate. No specialized construction equipment is required. Our Road layer can be reworked without the need for additional stabilizer being added should the need arise. USES OF ROAD STABILIZER PRODUCT: Unsealed roads/surfaces. With unsealed surfaces, a wearing course material would need to be selected containing a certain amount of clay to assist in the binding of this material. Our Road Soil Stabilizer corrects the negative aspects of this clay content allowing far greater densities to be achieved, resulting in a greater resistance to abrasion thereby lowering material loss to this surface. Sealed roads/surfaces. With a sealed surface, the main requirement for the selection of a suitable material is its bearing capacity. Materials with a clay content have a tendency to absorb water after compaction, resulting in a low bearing capacity. Our Road Soil Stabilizer corrects this problem and materials retain their compacted density and become suitable. As treatment is permanent the only required maintenance to a sealed road with our Product is that of another seal layer over time. For more information see the Road Construction headlines (http://www.roadconstruction.com/).

http://www.eapa.org/ The European Asphalt and Pavement Association (EAPA) is the European industry association which represents the manufacturers of bituminous mixtures and companies engaged in asphalt road construction and maintenance. This site provides information about the organization but mainly focusses on the asphalt product. It provides useful references, background data and statistics, standpoints and technical information. http://www.nagsigs.org/ The International Geosynthetics Society (IGS) is dedicated to the scientific and engineering development of geotextiles, geomembranes, related products, and associated technologies

http://www.vbwasfalt.org/english.htm VBW-Asfalt - the Dutch Asphalt Pavement Association- is an association of road building contractors in The Netherlands. The main goal of VBW-Asfalt is to promote the application of asphalt by emphasising the technical and environmental quality of the product. About 100 companies, who are producing and/or laying asphalt, are member of VBW-Asfalt. The association covers about 95% of the asphalt market in The Netherlands (annual production 7.5 million tonnes hot mix asphalt). http://www.irfnet.org/ The International Road Federation is a not-for-profit, non-political service organisation. Its purpose and continuing objective is to encourage better road and transportation systems worldwide and to help apply technology and management practises which will give maximum economic and social returns from national road investments.

http://www.piarc.lcpc.fr/ The WORLD ROAD ASSOCIATION (PIARC) deals with road infrastructure planning, design, construction, maintenance and operation. The World Road Association has been founded in 1909. Today PIARC has 93 national or federal government members, 2,000 collective or individual members in 129 countries, and over 750 experts in 20 standing Committees and Working Groups ... http://www.beneluxbitume.org/ The organization is supporting her members on different levels. Benelux Bitume has 11 members which are collectively good for more than 90% of the total bitumen sales in its various sorts and applications. As external objective, the organization wants to carry all the technological and scientifical knowledge about bitumen and its applications to everyone who is interested in bitumen.

More information concerning Road Construction can be found in the Road Construction Library , Expert and Headline Modules. For example: