Sustainable Mass Transit

Challenges and Opportunities in Urban Public Transportation

Thomas Abdallah

• Publisher: Elsevier
• Year: 2017
• ISBN:
  9780128113004
• Topic: Technology & Engineering
• Subtopic: Transportation & Navigation
• Index: Technology & Engineering

Sustainable Mass Transit: Challenges and Opportunities in Urban Public Transportation examines the numerous types of mass transit systems, looking closely at all their key functions, including operations, maintenance, development, design, building and retrofitting. It examines the mitigation measures that reduce or eliminate negative environmental impacts, including green infrastructure, materials conservation, ecological conservation and other sustainable initiatives.

The book explores organizational best practices, environmental regulatory constraints and life-cycle assessments, describing which sustainable elements can be added while rehabilitating or expanding a mass transportation infrastructure or ancillary facility. The book concludes with a look at forthcoming sustainable initiatives that will enhance mass transit systems.

• Contains case studies from the United States, Europe, South America, Africa and Asia
• Uses applied research written by transportation practitioners and scholars
• Explores how Environmental Management System frameworks improve environmental performance in the operations, maintenance, design, rehabilitation and expansion of a mass transportation system
• Shows how teams from different fields, entities, agencies and cities can work together to solve complex sustainability challenges

Chapter 1

Sustainable Mass Transit

Abstract

Public transportation networks including subway or elevated train lines, light rail systems, commuter rail lines, and bus lines including bus rapid transit, help to take commuters out of single occupancy vehicles. The burning of fossil fuels, specifically in automobiles, creates pollution, and contributes to climate change with greenhouse gas emittance. Mass transit puts people into less carbon footprint producing transportation modes, and makes cities more sustainable. Mass transit provides opportunities for each person, transportation professionals, and government agencies to make cities more sustainable and to affect big change. One of the best of the myriad of reasons that has made employing mass transit one of the best and most effective solutions to the on-going mission to reduce emissions, save energy, reduce greenhouse gases in the atmosphere, and be more sustainable is that quality solutions and great opportunities are in the hands of real professional people that can make a difference.

Keywords

Sustainability; mass transit; light rail; bus rapid transit; clean buses; hybrid bus; ISO 14001; Environmental Management Systems

Introduction

Public mass transit systems including subway or elevated train lines, light rail systems, commuter rail, and bus service, rapidly move millions of people each day, and contribute less pollution per person than personal car usage in cities. In today’s world, far too many people travel back and forth to work or school each day by getting into their car, igniting an internal combustion engine, and driving. This humble routine emits great amounts of pollution and greenhouse gases into the atmosphere.

Modern society has centered around the proliferation of the automobile, a great invention that typifies human ingenuity. The car has provided individual freedom for people to move both within cities and between them in extremely short amounts of time, for both work, school and recreational activities. However, emissions from the exhaust end of the engine have been polluting the air for decades, and increasing the amount of greenhouse gases in the atmosphere.

Gasoline and diesel are typical fuels that must be burned or combusted to make the car engine run. These fuels are extracted and produced from ancient plant fossils that are discovered far beneath the surface of the earth. Energy from fossil fuels, which has also helped to create the modern world we live in, is used for transportation, manufacturing, agriculture, the heating and cooling of buildings, and many industrial processes and activities.

Mass transit is inherently sustainable in its practice, and has opportunities to be more sustainable in its operation. Sustainability initiatives embedded within mass transit’s infrastructure, facilities and vehicles help reduce electricity used by trains and ancillary transit structures, lessen the fuel usage of buses, and minimize environmental impacts.

Sustainability and Energy Use

Sustainability can be modestly described as not compromising the needs of future generations with the needs of the present. Consider the use of fossil fuels to cultivate energy needs. The scientific process to extract energy from coal, oil, or natural gas is perhaps the cornerstone of our contemporary civilization, and one of mankind’s greatest scientific achievements. However, the continuous combustion of fossil fuels for energy comes at a price that our future generations may have to pay for.

The many years of by-product air pollution have compromised the earth’s atmosphere and ecosystem, which are essential to the well-being of the planet. Air pollution dirties the air people breathe, and threatens the everyday health of humans. Pollution, which gets into the atmosphere, does not just disappear. Essentially pollutants that are emitted in the air, linger in the atmosphere and return back down to earth when it rains, getting into our oceans, lakes, and freshwater, and damaging the ecosystem.

In addition to air pollution, the amount of carbon dioxide, the major greenhouse gas, which is produced with the combustion of fossil fuels, is causing the climate to exponentially change. While all of us here on earth need the greenhouse gas effect to survive, too much greenhouse gases in the atmosphere trap more heat radiating from earth, creating an imbalance which begins to warm the planet. This causes more extreme weather events, including sea-level rise, which has led to dangerous flooding conditions in coastal cities.

Fossil fuels are a finite resource, and searching for more sources of energy beneath the surface of the earth is still ongoing, although with much deliberations. It also takes a great amount of energy to extract great amounts of energy, causing more pollution in the process. Giant wells which are bored deep into the ground to find and ultimately extract fossil fuels, refineries which transform them into usable fuel, and the transportation required to get fuel where it is needed take a lot of energy and fuel usage as well. This all leads to a giant carbon footprint for the energy sector, and without stopping or slowing down the burning of fossil fuels for energy, we will continue to damage the planet for next generations to fix.

There have been improvements and technological advancements to reduce pollution as a result of the combustion of fossil fuels over the last century. Regulations on the amount of permissible emissions have forced the reduction of pollutants through the years, but levels of pollution that are allowed still exist. Sustainable initiatives in every sector are necessary to reduce emissions, save existing resources, and reduce the amount of carbon dioxide in the atmosphere. In the transportation sector, which includes cars, trucks, airplanes, trains, buses, ferries, etc., the overall use of the automobile is the largest contributor to the release of air pollution and greenhouse gases, including carbon dioxide.

Looking back to the earlier definition of sustainability as not compromising the needs of future generations with the needs of the present, the realization is that the present and continued use of fossil fuels to create energy causes harm to the environment and contributes to global warming. A major solution and opportunity for any city to become more sustainable is to enhance, extend, or implement mass transit.

Mass Transit

Public transportation typically includes trains and buses that move individuals in large quantities back and forth to their desired destinations within cities. Subway trains traveling through underground tunnels, and trains running on elevated infrastructure, can move a huge number of people from destination to destination within large cities. When planning an urban environment, transportation is an essential component to be considered.

The subway train tunnel is the ideal mass transit infrastructure, in that it is below ground, it can travel unimpeded and very rapidly underground, and it does not take up valuable real estate or room above the surface. This leaves a city an opportunity to grow and develop a neighborhood in relationship to the mass transit system. In more recent decades, above ground light rail systems have been the mass transit system of choice for burgeoning cities to employ.

Light rail systems have grown in many small and large cities. Light rail is essentially the evolution of the electric streetcar system of the past. Light rail is prevalent all around the world, and has been recently increasing popularity in the United States. Almost every city includes a bus network. Bus rapid transit, which has also evolved in cities, provides an infrastructure solely dedicated for bus traffic only.

Each year millions of metric tons of carbon emissions are avoided and billions of gallons of gasoline are saved due to public transportation use in the United States. The most sustainable cities have mass transit networks and are less reliant on cars, which lead to reductions in pollution and greenhouse gas emittance. People who use mass transit as opposed to traveling in an automobile have a lower personal carbon footprint.

Mass transit does have its own substantial carbon footprint, pollution concerns, and significant environmental impacts. As a case in point, the predominant fuel for the use of buses is diesel, which is used in the fossil fuel burning internal combustion engine. The chief energy for trains is electricity. Electricity is similarly generated mostly by fossil fuel burning, especially the burning of coal, and the combustion emits bad air pollution and greenhouse gases.

While some electricity is produced by hydroelectric, solar, or wind power, which have little or no emissions, it is the burning of a fossil fuel predominantly that creates electricity. Reducing electrical consumption through sustainable initiatives decreases air pollution and greenhouse gas emittance. When electric train service in a city is plentiful and available, plus if it can become more energy efficient, it will make a city or region more sustainable.

Sustainability Elements

The mass transit industry over the past 20 years has had a revolution when it comes to being sustainable. A whole new discipline of sustainability has been established in the mass transit set of core values. Along with safety, integrity, reliance, resilience, customer service among others, sustainability has become as much a part of the fabric of the mass transit sector as any other core value. Sustainable elements are initiated to make the train and light rail systems more energy efficient.

Sustainable elements can be part of the infrastructure, including track, lighting, signal systems, substations, subway or train station environments, and the ancillary facilities, such as train car maintenance shops, train car storage facilities, and/or bus depots. Vehicles have also been made more energy efficient to save fuel or electricity. Buses that traditionally run on diesel fuel have seen a major upheaval when it comes to being more efficient and a whole lot cleaner.

Clean Buses

According to The American Public Transportation Association (APTA), almost half of all US public transportation buses as of January 1, 2015 were using alternative fuels, such as compressed natural gas, biodiesel, or hybrid technology, with hybrid buses comprising 16.7% of US transit buses. Hybrid buses have helped ignite the proliferation of the entire hybrid automotive industry.

Twenty years ago, there were a handful of hybrid buses used throughout the country, with very few public agencies participating in this relatively new technology. Today most bus fleets have at least some percentage of hybrid buses, and many have very large percentages including entire fleets of hybrid buses. At the beginning of their usage, they were studied intensely, and that information in that analysis became available to aid not only the bus industry, but also the entire automobile business in helping to study and continue to improve the performance of hybrids.

An important metric for the mass transit industry is miles traveled between failures, and studies were conducted to ascertain the overall effectiveness of hybrid buses in regard to maintenance routine and schedule. These studies included performance analysis in various environments, such as cold or hot climate. As a benefit of the government-infused funding of hybrid buses in the public transportation sector, today almost all bus manufacturers have hybrid options for almost all of their vehicles.

Growing and Revitalizing a City

The subway system of New York City helped it grow into what is arguably the greatest city in the world and definitely the economic centerpiece of the universe. Many factors contributed to New York City’s evolution, none more important than the below ground subway system, which carries millions of commuters every day, and has been called the lifeblood of the city. Mass transit can make a big difference in the growing or revitalization of a city.

Numerous large cities have excellent subway or rail systems and reap the benefits both sustainably and economically. New York City is a great example of a sustainable city because of its mass transit system. Almost half the population in New York City does not own or has access to a car. Energy consumption per person in New York City is one quarter the national average due largely to mass transit operations including subway and bus service.

In New York City, the birth of the subway system led to the proliferation of large office buildings centrally located in Manhattan, and a good majority of people taking public transportation from the outer boroughs. The tremendous amount of buildings including many skyscrapers in Manhattan, and numerous residences in the outer boroughs, means the heating and cooling of buildings and homes make up the largest percentage of pollution and greenhouse gas emissions in New York City.

Investing in mass transit is fundamentally good for the economy. A city with numerous mass transit options will attract people who want to reside in an urban environment and live near transit. By adding mass transit within a city, it can help grow its population, which in due course should translate to more money in their economy. Public transportation agencies play a critical role in any region or city in addition to providing mobility options, transit agencies employ many people, and contract with private vendors for engineering services, fuel and other materials and services.

Subway, Light Rail, or Bus Rapid Transit

To institute a new mass transit, infrastructure within a city or between regions is very complex, costly, and time consuming. Tunneling a new subway system is extremely expensive and takes considerable time, is intrinsically fraught with delay after delay, and has numerous potential environmental impacts in construction. However, for existing cities without the large funding required to implement mass transit by way of subway tunneling or building an elevated train line, considering either light rail or bus rapid transit built above the surface can be an attractive alternative.

Light rail, including trams or streetcars, is an increasingly popular transportation choice for cities to integrate reliable and convenient transit services. Predominantly, light rail is constructed side by side of the existing street network in their own dedicated infrastructure. Light rail systems have categorically begun to proliferate, and have reinvigorated the heart of many cities in the United States and around the world by bringing improved transportation options.

New light rail implementation can be intricate as it is usually designed and constructed on or adjacent to a current streetscape; however, it’s complexity is dwarfed by the multifarious nature of building a new subway tunnel. Government funding today is going more toward new light rail than the more traditional heavy rail systems. A light rail, tram, or streetcar service can also connect existing bus services including bus rapid transit, to create, expand, or improve a mass transit network.

Bus rapid transit is a bus-based mass transit system, that has a specific street or highway infrastructure that removes the major source of bus delay, other traffic, with the aim to combine the volume and speed of light rail with the flexibility and lower cost of a bus system. A real benefit of bus rapid transit is that implementation can begin, in some cases, almost immediately if using existing lanes of traffic with some small modifications. For a more dedicated and appropriately equipped street infrastructure, it may take some time for planning, designing, and construction prior to complete bus rapid transit operation.

Subway, light rail, or bus rapid transit can help grow a city, and have revitalized large, medium, and small cities around the world, who have enhanced, extended, or implemented any or all of them. They take people out of their cars and into mass transit. In many instances, new implementation of lig...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• Dedication
• Chapter 1. Sustainable Mass Transit
• Chapter 2. Infrastructure, Facilities and Vehicles
• Chapter 3. Energy
• Chapter 4. Environmental Impacts
• Chapter 5. Sustainability in Train Rail Systems
• Chapter 6. Sustainable Initiatives for Public Bus Networks
• Chapter 7. Future Challenges and Sustainability Opportunities
• Chapter 8. Environmental Mitigation of Construction Impacts
• Chapter 9. Environmental Management Systems
• Chapter 10. Continuous Sustainability in Mass Transit
• Case Studies of Mass Transit Agencies
• Appendix A. Glossary of Terms
• Appendix B. Environmental Acronyms
• Appendix C. Photos
• Index