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This circular was prepared by Asif Faiz, Emeritus Member of the TRB Committee on Low- Volume Roads. Faiz received his undergraduate degree in civil engineering from Peshawar University in Pakistan in 1968. He received his master’s and doctoral degrees in transportation engineering from Purdue University in 1971 and 1975, respectively. He then joined the World Bank as an economist in the West Africa region. His international development experience of 37 years covers more than 40 developing countries in Sub-S

Most of the dual layer paving in Japan is performed by the Multi-Asphalt Paver, manufactured by SUMITOMO (S.H.I.) CONSTRUCTION MACHINERY CO., LTD (SUMITOMO) As per the introduction report to follow, this machine can simultaneously handle two different types of asphalt mixtures and can perform two kinds of paving methods. First one is Dual layer paving (it is called Dual Asphalt Pavement method), and the second is Multi Lane Pavement method. Hereinafter, paving methods using the Multi-Asphalt Paver will be

Sydney’s Hills M2 motorway is being widened while still carrying traffic and meeting tough environmental criteria More than 100,000 vehicles and over 27,000 bus commuters use the Hills M2 motorway on a typical workday, making it one of Sydney’s busiest motorway corridors. Owned and managed by Hills Motorway Ltd (HML) and a key part of the city’s orbital motorway network, the road stretches over 21km, providing a seamless link between the Lane Cove Tunnel and Westlink M7. The Hills M2 Upgrade is one of many

MIRA in central England has begun a huge redevelopment of its 830 acre site that will see the renowned centre for transport technologies expand its capabilities while, at the same time, create the largest transport research and development technology park in Europe. Guy Woodford reports This is all very impressive,” said Deputy Prime Minister Nick Clegg in April 2011 on hearing a presentation of MIRA’s ambitious expansion plans. As succinct appraisals go, Clegg’s view of MIRA’s plans to develop its brand of

As India's economy registers 9% annual growth, promising material super-power status by mid-century, the nation is barely beginning to address a silent disaster, that of road casualties It was Dr. P K Sikdar [a director of International Consultants and Technocrats/ICT and a former director of the Central Road Research Institute/CRRI] who coined the phrase "silent disaster."

From chip fat to banana bags, the race is on to find new bitumen additives which will solve two problems with one solution: replace diminishing petrochemical-based products and make use from waste rather than landfilling it - Kristina Smith reports It is not just the desire to preserve our environment which is driving the industry’s search for products which don’t eat up raw materials. The hunger of emerging economies – particularly China – mean that resources can be hard to come by, so it makes sense for s

The first cable-stayed bridge in Nigeria will link two districts of the megacity of Lagos Nigeria’s first cable-stayed bridge, the Lekki Ikoyi Bridge in the megacity of Lagos is scheduled for completion at the end of 2012. Its striking 90m high pylon characterises the appearance of the 1,357m long bridge, which will connect two districts of the West African city, Lekki on the Lekki Peninsula and Ikoyi on Lagos Island.

In Japan, major efforts are being made to both conserve energy and materials, while also delivering high quality airport runways. At Haneda Airport, as well as at the Fukuoka, Chitose and Sendai airports, innovative use is being made of asphalt paving equipment from Sumitomo. The latest model HA60W J paver from Sumitomo is being used to lay warm mix asphalt, while the contractors is also using sophisticated control technology. To minimise disruption to flight schedules, construction work at Haneda has been

India's growth rate is the envy of the world, and its infrastructure is rapidly improving, but its road safety record is the world's worst. Patrick Smith reports on a conference aimed at finding answers to the problems Ambling through the gardens and marble magnificence that is the Taj Mahal or gazing down on the city of Jaipur from the hilltop Jaigarh Fort is far removed from the world outside.

To meet tough emissions legislation for Europe and North America, JCB is offering a brace of new machines powered by its latest diesel, the new Ecomax engine. JCB’s backhoe loaders, telehandlers and smaller JS excavators will be the first machines fitted with the new Ecomax engine. However this will also be installed into various models in the line-up including those in the wheeled loader, skid steer loader and rough terrain forklift ranges.