It is possible to redesign the existing roads to provide a safer and more convenient environment for non-motorized modes. This also results in improved efficiency of public transport vehicles and enhanced capacity of the corridor when measured in number of passengers transported per hour per lane. A great majority in Iran today accepts environmental protection as one of the most important goals. The answer to the growing conflict between environment and transport is the model of "sustainable mobility" which follows from the concept of "sustainable development", the keynote of the UN-Conference for Environment and Development in Rio de Janeiro 1992. In fact the tight Iran regulations to avoid or at least to minimize interferences in nature and landscape have a very high rank in the planning of new roads, bypasses or alterations to old roads. In these cases the legal instrument of "Highway Design Guidelines" will guarantee road safety its important place. For the covering abstract see ITRD E137120.
Samenvatting