New legislation has changed fuel specifications as well as engine emission requirements, writes Claire Symes. The latest Stage IIIB engines mean that on-site maintenance routines for newer equipment need to be changed. And at the same time, new fuel specifications also mean changes to management of fuel for all machines. The European standard for gas oil, EN590, changed at the start of the year in order to comply with the Renewable Energy and Fuel Quality Directives. This means fuels now must be low sulphur
All around the world, vehicle numbers are growing fast and existing roads are seeing increasing congestion. This rapid increase in vehicle ownership is particularly acute in the developing world. Reductions in actual vehicle purchase costs have resulted in an explosion in vehicle numbers using the roads.
In the past, governments were able to fund road expansion programmes from their own sources. The most ambitious of these came when the US Government commenced construction of the Interstate system in 1956,
A new system from Topcon Positioning is taking the firm into a new market segment. Mark Contino is vice-president of North American Retail Distribution at Topcon Positioning Systems and commented that the technology is now well-accepted on larger projects, “We’ve been doing GPS since the late 1990s. It’s not new anymore. Everyone uses it now.”
Using ground penetrating radar to determine reason for serious pavement settling in Kentucky-Tennessee tunnel
Just a few years after the opening of the Cumberland Gap Tunnel, highway officials noticed moderate to severe settling of the continuously reinforced concrete pavement. The mountain tunnel provides an important link between Kentucky and Tennessee along US25E and the problem looked serious, with many voids discovered beneath the pavement surface.
To investigate the problems, the Kentucky Transpor
