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Maintenance of roads in historic districts is a challenge for communities around the world. The sanctity of the surroundings limits the amount of re-engineering and widening that can be considered. Improvement options typically are limited to repairs. Yet repairs also have an impact. The historic areas usually attract tourists and their crucial economic contributions. If the street repairs create too much of an inconvenience, tourists are likely to avoid the area and a negative economic impact and a loss of

Rising energy costs and increased awareness of safety and environmental issues have encouraged the development of Warm Mix Asphalts (WMA), which are typically produced at temperatures of between 130°C and 145°C, compared with around 175°C for traditional Hot Mix Asphalt (HMA). WMAs are regularly used in many European countries, as well as both North and South America. The three most common ways to lower the working temperature of asphalt are: a) foaming technologies; b) wax additives; and c) chemical (surfa

Productivity and profitability mean more than how many metres per minute your cold planer mills. In today’s world, precision is every bit as important as pace. Precision eliminates costly rework. It ensures crews don’t remove excess materials, and incur the associated costs in fuel, hauling and machine life. Precision also impacts the entire life—and cost—of a project by creating the proper foundation on which all subsequent work occurs. Cat® Grade and Slope for cold planers helps deliver that precision. Am

Copenhagen, Denmark, has long been known as one of the world’s leading cities for cycling. In some areas of the city, the modal share of bikes has reached a level of as much as 50 %. And on some of the most frequently used bike paths the average daily number of cyclists is close to 30,000. As these numbers continue to rise, new ways of planning and implementing cycling infrastructure are needed. Increasingly, Danish traffic planners are turning to technology as a tool for planning cycling infrastructure. I

Designing structures and pavements to accommodate warmer weather and more extreme temperatures On October 22nd, IRF held a notable workshop on environmental protection and the impacts of climate change in Cordoba, Argentina, in conjunction with the XVI Argentine Congress of Road Administration and Traffic. The workshop addressed a topic of key concern to transportation planning and design professionals around the world. The discussion was animated by guest panellists Professor Ram M Pendyala and Gordon Rex

The rural roads near Brandýs nad Labem, in the heart of the Czech Republic, may not be as heavily travelled as their counterparts in Prague, about 25km (15.5 miles) to the southwest, but they are nevertheless crucial pipelines to the rural and agricultural areas of the country. An assessment by regional authorities indicated that these roads are in need of repair. That led to cold planing and paving work on a series of rural roads near Brandýs nad Labem. Regional authorities have two key requirements: The r

Pneumatic concrete dowel drills have one purpose – to drill holes. While their intended use is easy to recognize, operation of this equipment isn’t quite so simple. In fact, it’s a bit of a science. That’s not to say they’re difficult to operate. But there are certain best practices and processes to keep in mind for proper drill operation, whether it’s an on-grade, slab-rider or equipment-mounted model. Operators who adopt these guidelines and implement them on every job are rewarded with better performance

The emergence of Brazil as a major economic force and its need to improve infrastructure is proving a magnet for investment. Patrick Smith reports. Brazil is now the sixth biggest economy in the world according to its Finance Minister Guido Mantega. The largest country in South America with a population of 190 million and one of the BRICS, (Brazil, Russia, India, China, South Africa, Brazil’s economy grew 2.7% in 2011 and is now worth $2.5 trillion, having overtaken the UK. With big oil and gas reserves sti

Early evaluation of surfacing work on the M90 at Rosyth – the first major application of Scotland’s new TS2010 specification – has earned positive praise. Transport Scotland’s determination to obtain pavement that is durable, long lasting and safe (especially in early life) is clearly apparent on the M90 just north of the Forth Road Bridge. Here surfacing has been carried out this spring to TS2010, a tough new specification designed to ensure thin surfacing pavements that work. And the initial prognosis is