There has been growing attention to the energy and environmental resource demands of transportation systems at national, regional and city levels. Currently, societies are expending enormous resources – financial, natural, human, technological etc for meeting ever expanding transportation needs so as to enhance quality life in an effective manner. Multipronged approaches are currently in vogue to maximize positive externalities and minimize risks. While there is desire to think in a holistic manner for addressing the innate intricacies and interconnectedness involved in social, economic, and environmental aspects of transportation sector but conflicting interests, divergent perspectives and competing demands for resources limit identification and implementation of options. As a result, governments often tend to respond in knee-jerk manner. Hence ad-hocism and crisis management are the key drivers of decision making.
Proper transport facilities connecting rural and urban regions form the pre-requisite for the development of any nation. The global human population has increased at fourfold rate in the 20th century but the movement of people and goods increased by one hundred fold. Currently world fleet is growing twice the rate of growth of population. But the growth rate of fleet is higher among the developed countries compared to the developing countries. According to Global Insight, global passenger car production in 2007 rose to 52.1 million units from 49.1 million in 2006. If light trucks are added, the combined total in 2007 is 75.8 million units. According to PWC projections, by 2015 worldwide capacity of cars and light trucks production is expected to be 97 million units (Renner M, 2008).
Evidences across the world showcase the manifold impacts of transport sector on environment and its resources in terms of depletion of non -renewable fossil fuels as well as contributing to global and local emissions. For instance, transport sector is estimated to contribute around 20% of the global Green House Gas (GHG) emissions. For instance, data shows that emissions of CO2 (major GHG) from the burning of fossil fuels increased by a factor of seven during the 20th century; with a corresponding increase of about a third in atmospheric CO2 levels (OECD, 2000).
Motorized mobility has contributed significantly in improving quality of life as well as in increasing access to resources and services for all sections of society including the poor and underprivileged in far-flung and remote areas. It has expanded the intellectual horizons, contributed towards efficient production and distribution thereby deterred starvations to a great extent. While acknowledging the positive socio-economic contributions made by the increases in mobility, it should also be highlighted that further increases in mobility could be detrimental to society as the societies may become more polarized, more dispersed, more anonymous, less child-friendly, less culturally distinctive, less physically healthy, more crime-ridden, and even less democratic (FT Automotive, 1998).
Apart from the global emissions, transport sector contributes significantly to regional and local level environmental problems, which have human health impacts. Major regional and local emissions contributed by the transport sector include Carbon Monoxide (CO), Volatile Organic Compounds (VOCs), Nitrous Oxides (NOX). Added to this, nuisance of noise and the congestion impacts of transportation along with increasing paving of the roads, spreading of urban sprawl, degradation of ecosystems, and interference with natural drainage have their role in deterioration of environmental profile in local, regional and global context. Transport is not only the major user of oil i.e., it accounts for around 60 per cent of the amount extracted but also consumer of major materials, including aggregates, cement, steel, and aluminum. It is said that production of vehicles and transport infrastructure accounts for 20.–.40 per cent of consumption of above stated materials (OECD, 2000). In the developed world context, both energy production and industrial growth have uncoupled from energy consumption and CO2 emissions but in the transport sector, growth in activity is linked with growth in emissions.
Increasing safety hazards and the social impacts of transportation further add to environmental problems enlisted above. There is now a broad agreement that present trends in transport sector are not sustainable from environmental and socio-economic perspective and many conclude that fundamental changes in the technology, design, operation, financing and management of transport systems are needed. Hence the major challenge faced by policy makers is to enhance the benefits of transport in an equitable manner by simultaneously reducing the social and environmental externalities imposed by the same so as to make it sustainable.
World over, countries grappling with the multidimensional problems of transport sector and its interface with environment, has become a major challenge to policy makers to maintain/enhance transport benefits while reducing its impacts to sustainable level. Projections for 2030 shows that CO2 emissions by transport sector globally would almost double and the local criteria pollutions like CO, VOCs & NOx are also estimated to increase. The likely advances in technology will not be sufficient to overcome increased environmental impacts resulting from growing transport demand (OECD, 2000). This calls for innovative approaches, management tools and techniques for addressing these concerns and one such tool, which is emerging as a means for internalizing environmental and socio-economic externalities of transport sector as well as a approach for institutionalizing the same is Strategic Environmental Assessment (SEA).
Though there is an acknowledgment of non viability and unsustainability of the resource intensive transportation pathways adopted by the western societies, most of the developing countries, barring a few localized exceptions, tend to tread in the same direction. The hope that telecommunication revolution would assuage the ever growing demand of people transportation have been belied. Instead, through multiple information channels it further accentuated the transportation demands of people and goods. Increasing investments in personalized transport, expanding road networks through public and private investments, fascination for expensive public transportation systems are perceived as socially pragmatic solutions.
Identifying relevant aspects of the current state of the energy and environment and the likely evaluation of the scenarios is a critical need. Considering energy and environmental protection and energy conservation objectives, established at national, state and city level in an integrated manner including potential effects on issues such as biodiversity, population, human health, fauna, flora, soil, cultural heritage including architectural and archaeological heritage, landscape etc and energy consumption patterns and the interrelationship between the above factors should be periodically assessed and factored in the decision making process.
Environmental Issues in Transport Sector:
Vehicular emissions in urban areas is one of the major environmental concerns that gets highlighted from the perspective of local and global environmental impacts. Emissions such as CO, unburned HC, Pb compounds, NOx, soot, suspended particulate matter (SPM) and aldehydes etc create negative health impacts such as cough, headache, nausea, irritation of eyes, various bronchial problems and visibility. In global environmental perspective, increasing carbon footprints due to transportation in general and vehicular transport in particular are proving to be a critical concern for climate change.
India has 3.3 million kilometers of road network, which is the second largest in the world. Roads occupy an eminent position in transportation as they, as per the present estimate, carry nearly 65% of freight and 87% of passenger traffic. Traffic on roads is growing at a rate of 7 to 10% per annum while the vehicle population growth, for the past few years, is of the order of 12% per annum. Experiences within and outside the country demonstrate that unlike other services, growth of transport services proportionately or even in greater proportion to economic growth influences the environment adversely. While both mobility of people and freight have been increasing across the nations and within the nations but in the context of this paper, focus is towards the mobility of people especially in the urban areas. Auto emissions currently account for approximately 70% of air pollution (Indianfoline, November 1999). The damages due to the health impacts of air pollution from mobile sources alone would rise from $ 520 million per year in 1995 to almost $ 7 billion annually, in real terms, by the year 2020. Evidence shows that increased urban traffic in India is contributing to deterioration in local and global air quality levels which requires policy, institutional and fiscal interventions from short terms to long term perspective.
Apart from expanding the road network, increasing investment in the public transport network that would entail reduction of both fossil fuel consumption and environmental pollution as well as improvement in the road safety has been the way forward. There is a need to evaluate the extent of improvement that will be brought about on a city, state, nation and global basis. Based on such an analysis, recommendations for further improvements to the proposed policies, plans, programmes and projects should be determined by forecasting the integrated impact of energy and environmental resource consumption and degradation levels of transportation solutions.
It is important to identify their role in urban transport by examining their plans and programmes, evaluating strengths and weaknesses of the current institutional framework and understanding the gaps and problems in existing level of work integration with each other. One of the major limitations identified by various systemic evaluations in the Indian transportation shows that there is a lack of awareness and capacities to evaluate options (short term & long term) and take appropriate decisions. Some of the salient features of Indian transport sector are:
- Transport improvement plans/programs are undertaken on standalone basis without holistic assessment of the cumulative benefits/losses
- Lack of integrated approach towards diagnosis and solving the air pollution emanating from vehicles
- Cycle, pedestrians and other means of transport are not considered during transport planning stage
- Focus is more on adopting the western style of transport system for Indian scenario without enough research and technical due diligence vis-à-vis Indian requirement
- Less importance given to linkage between transport and land use planning while formulating transport plans/programs
- Less emphasis given to improving mass transport system while formulating transport policies.
To address these issues and concerns, globally Strategic Environmental Assessment is being deployed for improving environmental outcomes of transport sector. Strategic Environmental Assessment (SEA) is an essential tool for effective decision-making in transport policy development and investment planning. It enables assessment of impacts that go beyond the boundaries of individual projects or unitary planning authorities, and such impacts characterize investments in expanding trunk transport capacity. SEA also functions as an early warning system, identifying potential problems, and beginning consultation on resolving conflicts of interest, early in the planning process –reducing the risks of protests late in the day and the high costs associated with the delays that result
LEARNING FROM INTERNATIONAL EXPERIENCES:
Last decade has seen SEA developed for transport planning in many countries for instance, in US, some states has environment policy laws, which require environmental impact assessment for plans. In these cases, state or local governments conduct environmental impact studies before approving transportation plans or comprehensive plans. A number of EU countries are applying SEA at regional level. Some regional governments of Spain and Italy have passed legislation for SEA of transport activities/land use plans. These experiences show that SEA for transport sector evaluates both transportation performance measures and environmental quality indicators. Some of the transportation performance measures included measures of delay and traffic congestion and predicted model. The environment quality indicators included air quality, noise, land use, water quality, and damage to ecosystem. Based on SEA output, considerable public consultations are carried out and a transportation plan is accepted which would represent the balance between environment and transport benefit. For areas, which do not meet air quality standard, legislation requires that the transportation plan demonstrate how air quality standards will be met in the future. In certain cases it involved quantitative modeling of air emissions from transportation sources. If the transportation plan fails to show that it will contribute to air quality levels that satisfy the standards, then the project is not allowed.
Usually environmental evaluation at SEA stage addresses following impact areas:
- traffic congestion,
- energy consumption,
- air quality,
- land use,
- community impacts,
- water resources and
- land resources
In some cases, SEA also included social impacts with scope limited to effects on mobility, health and living conditions in nearby communities.
The need for building in social, economic and environmental concerns right at the inception of a project and to have an interactive and cumulative planning system has been recognized and accepted in almost all policy documents. However despite all the right policy documents, the impact of these concerns has been rather limited. This is because the policy provisions haven’t been translated into adequate implementation measures, and there has been no integration with the policies of other sectors. There appears to be a lack of coordination between agencies like in the transport and land development sectors-partly because of inadequate participation of local bodies. Therefore mechanisms for integrated transport planning strategies and urban and regional settlement strategies need to be put in place to minimize the stress on environment and developed modes complement each other.
Today the role of a transport system is increasingly seen with a different perspective-its performance is to be judged not in transport terms, but in relation to its delivery of the wider community objectives. It is now evident that a much cleverer and more integrated approach is required that calls upon a range of multi-modal infrastructure and non-infrastructure measures to address transport problems and objectives. Which transport systems are chosen and how efficiently they deliver answer many questions about a city’s /country’s future. Successful Urban transport projects require supportive policy settings like transport demand management, suitable land use planning, economic instruments, modal integration with non-motorized transport, public awareness and support, viable financing etc. This integrated and comprehensive approach to transport planning is evident in countries and regions that have deployed SEA as a management tool.