ICE - Institution of Civil Engineers - Virtual Library

ICE's ‘Telford Apprentices’ are 13 young engineers from around the UK. Here they discuss sustainability and the role of young engineers in advancing and delivering the sustainability agenda.

This briefing article reviews the recently relaunched regional sustainable development framework (RSDF) for the south west of England. In 1999 all UK regions were asked by the government to develop RSDFs to inform policy and delivery. The south west has redeveloped its framework as an online tool called the ‘Sustainability Shaper’. Here the Shaper's coordinators, Sustainability South West (SSW), introduce this new awareness-raising and decision-making tool and outline priorities for its future development and influence.

During 2001 the Highways Agency (HA) commissioned TRL Limited to undertake a study to assess the feasibility of generating renewable energy on motorways and trunk roads. This study recommended that the HA undertake a full-scale trial of noise barriers incorporating solar panels. In 2004, two rows of solar barriers were installed in a cutting to the east of junction 9 of the M27. The trial was carefully monitored and showed that south-facing land alongside highways can successfully be used for solar barriers. In terms of maintenance, rainfall was effective in washing the panels; however, vegetation needs to be cut back at least annually unless the barrier is installed in a paved area. There was no evidence that drivers were distracted by the presence of the barriers or that noise reflected from the barriers would create any significant disturbance opposite the site. Although solar barriers are a feasible means of generating renewable energy on the highway estate, a whole-life cost analysis showed that the electricity generated over 30 years would not pay for the cost of installing the barriers unless the price of electricity was many times its current value.

A major global problem is access to transport and thus mobility. Clearly, without mobility, economic vitality is severely curtailed; however, mobility and economic vitality brings a number of externalities not least in terms of pollutants. As such, there is a need to make sustainable mobility a priority. The World Business Council for Sustainable Development defined sustainable mobility as ‘the ability to meet society's need to move freely, gain access, communicate, trade and establish relationships without sacrificing other essential human or ecological values, today or in the future’. The question is: how should this be achieved? This paper outlines the background to the problem of sustainable mobility, including a simple economic model that sets the problem in context. The focus is on three potential ways of addressing the issue of sustainable mobility: the market-based solution; technological change; and the promotion of sustainable modes of transport defined as public transport, walking and cycling. It is important to note, however, that these are not mutually exclusive and that ‘more mobility’ is not necessarily better.

The Severn Estuary provides the UK with a unique opportunity to harness a large amount of renewable energy from the tides. A barrage 10 miles (16 km) long has been proposed as a means of harnessing this energy. The scheme would be similar, but on a larger scale, to that in the Rance Estuary, northern France, which has consistently and predictably produced electricity over the last 40 years. The studies presented here illustrate the output patterns of the Severn Barrage once the barrage is closed but before project completion, taking into consideration important factors such as: National Grid integration; environmental sensitivities and turbine and pumping characteristics. Assuming the main determine and of operating procedure is production of maximum energy, total barrage output could be 33 TWh by project completion. This is equivalent to almost two years of output from the completed scheme. Furthermore, if barrage closure were to occur earlier than previously envisaged, significantly more electricity would be produced during the construction phase, thus further enhancing the projects economic prospects.