Effects of the car on societies
Since the start of the twentieth century, the role of the car has become highly important though controversial. It is used throughout the world and has become the most popular mode of transport in the more developed countries. In developing countries, the effects of the car on society are not as visible, however they are significant. The development of the car built upon the transport sector first started by railways. This has introduced sweeping changes in employment patterns, social interactions, infrastructure and the distribution of goods.
Nonetheless the positive effects on access to remote places and mobility, comfort provided by the automobile, allowing people to geographically increase their social and economic interactions, the negative effects of the car on everyday life are not negligible. Although the introduction of the mass-produced car represented a revolution in industry and convenience,   creating job demand and tax revenue, the high motorisation rates also brought severe consequences to the society and to the environment. The modern negative consequences of heavy automotive use include the use of non-renewable fuels, a dramatic increase in the rate of accidental death, the disconnection of local community,   the decrease of local economy,  the rise in obesity and cardiovascular diseases, the emission of air and noise pollution, the emission of greenhouse gases, generation of urban sprawl and traffic, segregation of pedestrians and other active mobility means of transport, decrease in the railway network, urban decay and the high cost per unit-distance on which the car paradigm is based.  
In the early 20th century, cars entered mass production. The United States produced 45,000 cars in 1907, but 28 years later, in 1935, that had increased nearly 90-fold to 3,971,000.  The increase in production required a large new workforce. In 1913, 13,623 people worked for the Ford Motor Company, and by 1915 that had increased to 18,028. [ better source needed] Bradford DeLong, author of The Roaring Twenties, noted that "Many more lined up outside the Ford factory for chances to work at what appeared to them to be, and (for those who did not mind the pace of the assembly line much) was an incredible boondoggle of a job. " There was a surge in the need for workers at big, new high-technology companies such as Ford. Employment increased greatly.
When the motor age arrived in western countries at the beginning of the 20th century, many conservative intellectuals opposed the increase in motor vehicles on the roads. Those increases removed space for pedestrians, made walking more dangerous, and brought a tremendous increase in pedestrian deaths caused by car collisions.
|“||Sir,–I am delighted with the suggestion made by your spirited correspondent Sir Ralph Payne-Gallwey that all pedestrians shall be legally empowered to discharge shotguns (the size of the shot to be humanely restricted to No. 8 or No. 9) At all motorists who may appear to them to be driven to the common danger. Not only would this provide a speedy and effective punishment for the erring motorist, but it would also supply the dwellers on popular high roads with a comfortable increase of income. "Motor shooting for a single gun" would appeal strongly to the sporting instincts of the true Briton, and would provide ample compensation to the proprietors of eligible road-side properties for the intolerable annoyance caused by the enemies of mankind.||”|
Ten years later, Alfred Godley wrote a more elaborate protest, " The Motor Bus", a poem which cleverly combined a lesson in Latin grammar with an expression of distaste for the new form of motor transport.
Worldwide, the car has allowed easier access to remote places. However, average journey times to regularly visited places have increased in large cities, as a result of widespread car adoption and urban sprawl, as well as the decommissioning of older tram systems. This is due to traffic congestion and the increased distances between home and work brought about by urban sprawl. 
Examples of car access issues in underdeveloped countries are for example the paving of Mexican Federal Highway 1 through Baja California, completing the connection of Cabo San Lucas to California. In Madagascar, another example, about 30% of the population does not have access to reliable all-weather roads  and in China, 184 towns and 54,000 villages have no motor road (or roads at all). 
The development of the car has contributed to changes in employment distribution, shopping patterns, social interactions, manufacturing priorities and city planning; increasing use of cars has reduced the roles of walking, horses and railroads. 
In addition to money for roadway construction, car use was also encouraged in many places through new zoning laws that required any new business to construct a certain amount of parking based on the size and type of facility. The effect was to create many free parking spaces, and business places further back from the road. In aggregate, this led to less dense settlements and made a carless lifestyle increasingly unattractive.
Many new shopping centers and suburbs did not install sidewalks,  making pedestrian access dangerous. This had the effect of encouraging people to drive, even for short trips that might have been walkable, thus increasing and solidifying American auto-dependency.  As a result of this change, employment opportunities for people who were not wealthy enough to own a car and for people who could not drive, due to age or physical disabilities, became severely limited. 
In countries with major car manufacturers, such as USA or Germany, a certain degree of car dependency might be positive for the economy at a macroeconomic level, since it demands automobile production, therefore resulting also in job demand and tax revenue. These economic conditions were particularly valid during the 1920s when the number of automobiles, worldwide, had a substantial annual average increase, but also during the post–World War II economic expansion. Notwithstanding the growing effects provided by the automobile on the economy of some countries, several other auto-dependent countries, deprived from automobile industry and oil resources, have to allocate substantial economic assets, to satisfy its mobility policies, affecting then their commercial balance. This situation is broadly valid in the majority of the European countries, since, disregarding some few exceptions such as Norway, Europe is largely dependent on imports for its fossil fuels. Furthermore, just few European countries, such as Germany or France, have car manufacturers productive enough to satisfy their country's internal demand for cars. All these factors related to high motorisation rates, affect therefore the economic growth in the majority of the European countries.   Most African countries are also dependent on imported cars, usually second-hand from Western countries, some of those vehicles being in a very worn-out state. Finally, even countries with oil resources could be deprived of refineries, such as Nigeria which has to import fuel even though it is a major oil producer.
As of 2009 the U.S. motor vehicle manufacturing industry employed 880,000 workers, or approximately 6.6% of the U.S. manufacturing workforce. 
Cycling steadily became more important in Europe over the first half of the twentieth century, but it dropped off dramatically in the United States between 1900 and 1910. Automobiles became the dominant means of transportation. Over the 1920s, bicycles gradually became considered children's toys, and by 1940 most bicycles in the United States were made for children. From the early 20th century until after World War II, the roadster constituted most adult bicycles sold in the United Kingdom and in many parts of the British Empire. For many years after the advent of the motorcycle and automobile, they remained a primary means of adult transport.
In several places - both high and low income - bicycles have retained or regained this position. In Denmark, cycling policies were adopted as a direct consequence of the 1973 oil crisis whereas bike advocacy in the Netherlands started in earnest with a campaign against traffic deaths called "stop child murder". Today both countries have high modal shares of cycling despite high car ownership rates.
Prior to the appearance of the automobile, horses, walking and streetcars were the major modes of transportation within cities.  Horses require a large amount of care, and were therefore kept in public facilities that were usually far from residences. The wealthy could afford to keep horses for private use, hence the term carriage trade referred to elite patronage.  Horse manure left on the streets also created a sanitation problem. 
The motorcycle made regular medium-distance travel more convenient and affordable and after World War I the automobile too, especially in areas without railways. Because cars did not require rest, were faster than horse-drawn conveyances, and soon had a lower total cost of ownership, more people were routinely able to travel farther than in earlier times. The construction of highways in the 1950s continued this. Some experts suggest that many of these changes began during the earlier Golden age of the bicycle, from 1880 to 1915. 
Beginning in the 1940s, most urban environments in the United States lost their streetcars, cable cars, and other forms of light rail, to be replaced by diesel-run motor coaches or buses. Many of these have never returned, but some urban communities eventually installed rapid transit.
Another change brought about by the car is that modern urban pedestrians must be more alert than their ancestors. In the past, a pedestrian had to worry about relatively slow-moving streetcars or other obstacles of travel. With the proliferation of the car, a pedestrian has to anticipate safety risks of automobiles traveling at high speeds because they can cause serious injuries to a human and can be fatal,  unlike in previous times when traffic deaths were usually due to horses escaping control.
According to many social scientists, the loss of pedestrian-scale villages has also disconnected communities. Many people in developed countries have less contact with their neighbors and rarely walk unless they place a high value on walking.
In the decades following World War II, the auto united in the United States with the single family dwelling to form suburbs. Suburban affluence led to a baby boomer generation far removed from the hardships of their parents. Community standards of the past, driven by scarcity and the need to share public resources, gave way to new credos of self-exploration. As the economy of the fifties and sixties boomed, car sales grew steadily, from 6 million units sold per year in the U.S. to 10 million. Married women entered into the economy and two car households with driveways became commonplace. In the seventies, however, the comparative economic stagnation then experienced was accompanied by societal self-reflection on the changes the auto brought. Critics of automotive society found little positive choice in the decision to move to the suburbs; the physical movement was looked upon as flight. The auto industry was also under attack from bureaucratic fronts, and new emission and CAFÉ regulations began to hamper Big Three (automobile manufacturers) profit margins.
Kenneth Schneider in Autokind vs Mankind (1971) called for a war against the auto, derided it for being a destroyer of cities, and likened its proliferation to a disease. Renowned social critic Vance Packard in A Nation of Strangers (1972) blamed the geographic mobility enabled by the auto for loneliness and social isolation. Auto sales peaked in 1973, at 14.6 million units sold, and were not to reach comparable levels for another decade. The 1973 Arab-Israeli War was followed by the OPEC oil embargo, leading to an explosion of prices, long gas lines, and talk of rationing.
While it may appear clear, in retrospect, that the automotive/suburban culture would continue to flourish, as it did in the 1950s and 1960s, no such certainty existed at the time when British architect Martin Pawley authored his seminal work, The Private Future (1973). Pawley called the automobile “the shibboleth of privatization; the symbol and the actuality of withdrawal from the community” and perceived that, in spite of its momentary misfortunes, its dominance in North American society would continue. The car was a private world that allowed for fantasy and escape, and Pawley forecasted that it would grow in size, and in technological capacities. He saw no pathology in consumer behavior grounded in freedom of expression.
Improved transport accelerated the outward growth of cities and the development of suburbs beyond an earlier era's streetcar suburbs.  Until the advent of the car, factory workers lived either close to the factory or in high density communities farther away, connected to the factory by streetcar or rail. The car and the federal subsidies for roads and suburban development that supported car culture allowed people to live in low density residential areas even farther from the city center and integrated city neighborhoods.  were Industrial suburbs being few, due in part to single use zoning, they created few local jobs and residents commuted longer distances to work each day as the suburbs continued to expand. 
The car had a significant effect on the culture of the United States. As other vehicles had been, cars were incorporated into artworks including music, books and movies. Between 1905 and 1908, more than 120 songs were written in which the automobile was the subject. [ failed verification] Although authors such as Booth Tarkington decried the automobile age in books including The Magnificent Ambersons (1918), novels celebrating the political effects of motorization included Free Air (1919) by Sinclair Lewis, which followed in the tracks of earlier bicycle touring novels. Some early 20th century experts doubted the safety and suitability of allowing female automobilists. Dorothy Levitt was among those who laid such concerns to rest, so much so that a century later there was only one country where women were forbidden to drive. Where 19th-century mass media had made heroes of Casey Jones, Allan Pinkerton and other stalwart protectors of public transport, new road movies offered heroes who found freedom and equality, rather than duty and hierarchy, on the open road.
George Monbiot writes that widespread car culture has shifted voter's preference to the right-wing of the political spectrum, and thinks that car culture has contributed to an increase in individualism and fewer social interactions between members of different socioeconomic classes.  The American Motor League had promoted the making of more and better cars since the early days of the car, and the American Automobile Association joined the good roads movement begun during the earlier bicycle craze; when manufacturers and petroleum fuel suppliers were well established, they also joined construction contractors in lobbying governments to build public roads. 
As tourism became motorized, individuals, families and small groups were able to vacation in distant locations such as national parks. Roads including the Blue Ridge Parkway were built specifically to help the urban masses experience natural scenery previously seen only by a few. Cheap restaurants and motels appeared on favorite routes and provided wages for locals who were reluctant to join the trend to rural depopulation.[ citation needed]
Road building was sometimes also influenced by Keynesian-style political ideologies. In Europe, massive freeway building programs were initiated by a number of social democratic governments after World War II, in an attempt to create jobs and make the car available to the working classes. From the 1970s, promotion of the automobile increasingly became a trait of some conservatives. Margaret Thatcher mentioned a "great car economy" in the paper on Roads for Prosperity.[ citation needed] The 1973 oil crisis and with it fuel rationing measures brought to light for the first time in a generation, what cities without cars might look like, reinvigorating or creating environmental consciousness in the process. Green parties emerged in several European countries in partial response to car culture, but also as the political arm of the anti-nuclear movement.
The rise of car culture during the twentieth century, played an important cultural role in cinema, mainly through blockbusters. Important characters such as James Bond, or the ones performed by James Dean, were always provided on scene with powerful automobiles, which through time, have become cultural icons.[ citation needed]
Over time, the car has evolved beyond being a means of transportation or status symbol and into a subject of interest and a cherished lifestyle amongst many people in the world, who appreciate cars for their craftsmanship, their performance, as well as the vast arrays of activities one can take part in with his/her car.  People who have a keen interest in cars and/or participate in the car hobby are known as "Car Enthusiasts".
One major aspect of the hobby is collecting. Cars, especially classic vehicles, are appreciated by their owners as having aesthetic, recreational and historic value.  Such demand generates investment potential and allows some cars to command extraordinarily high prices and become financial instruments in their own right. 
A second major aspect of the car hobby is vehicle modification, as many car enthusiasts modify their cars to achieve performance improvements or visual enhancements. Many subcultures exist within this segment of the car hobby, for example, those building their own custom vehicles, primarily appearance-based on original examples or reproductions of pre-1948 US car market designs and similar designs from the World War II era and earlier from elsewhere in the world, are known as hot rodders, while those who believe cars should stay true to their original designs and not be modified are known as " Purists".
In addition, motorsport (both professional and amateur) as well as casual driving events, where enthusiasts from around the world gather to drive and display their cars, are important pillars of the car hobby as well. Notable examples such events are the annual Mille Miglia classic car rally and the Gumball 3000 supercar race.
Many car clubs have been set up to facilitate social interactions and companionships amongst those who take pride in owning, maintaining, driving and showing their cars. Many prestigious social events around the world today are centered around the hobby, a notable example is the Pebble Beach Concours d'Elegance classic car show.
Motor vehicle accidents account for 37.5% of accidental deaths in the United States, making them the country's leading cause of accidental death.  Though travelers in cars suffer fewer deaths per journey, or per unit time or distance, than most other users of private transport such as bicyclers or pedestrians[ citation needed], cars are also more used, making automobile safety an important topic of study. For those aged 5–34 in the United States, motor vehicle crashes are the leading cause of death, claiming the lives of 18,266 Americans each year. [ failed verification]
It is estimated that motor vehicle collisions caused the death of around 60 million people during the 20th century  around the same number of World War II casualties. Just in 2010 alone, 1.23 million people were killed due to traffic collisions. 
Notwithstanding the high number of fatalities, the trend of motor vehicle collision is showing a decrease. Road toll figures in developed nations show that car collision fatalities have declined since 1980. Japan is an extreme example, with road deaths decreasing to 5,115 in 2008, which is 25% of the 1970 rate per capita and 17% of the 1970 rate per vehicle distance travelled. In 2008, for the first time, more pedestrians than vehicle occupants were killed in Japan by cars.  Besides improving general road conditions like lighting and separated walkways, Japan has been installing intelligent transportation system technology such as stalled-car monitors to avoid crashes.
In developing nations, statistics may be grossly inaccurate or hard to get. Some nations have not significantly reduced the total death rate, which stands at 12,000 in Thailand in 2007, for example.  In the United States, twenty-eight states had reductions in the number of automobile crash fatalities between 2005 and 2006.  55% of vehicle occupants 16 years or older in 2006 were not using seat belts when they crashed.  Road fatality trends tend to follow Smeed's law,  an empirical schema that correlates increased fatality rates per capita with traffic congestion.
According to the Handbook on estimation of external costs in the transport sector  made by the Delft University and which is the main reference in European Union for assessing the externalities of cars, the main external costs of driving a car are:
- congestion and scarcity costs,
- accident costs,
- air pollution costs,
- noise costs,
- climate change costs,
- costs for nature and landscape,
- costs for water pollution,
- costs for soil pollution and
- costs of energy dependency.
Use of cars for transportation creates barriers by reducing the landscape required for walking and cycling. It may look like a minor problem initially but in the long run, it poses a threat to children and the elderly. Transport is a major land use, leaving less land available for other purposes.
Cars also contribute to pollution of air and water. Though a horse produces more waste, cars are cheaper, thus far more numerous in urban areas than horses ever were. Emissions of harmful gases like carbon monoxide, ozone, carbon dioxide, benzene and particulate matter can damage living organisms and the environment. The emissions from cars cause disabilities, respiratory diseases, and ozone depletion. Noise pollution from cars can also potentially result in hearing disabilities, headaches, and stress to those frequently exposed to it.
In countries such as the United States the infrastructure that makes car use possible, such as highways, roads and parking lots is funded by the government and supported through zoning and construction requirements.  Fuel taxes in the United States cover about 60% of highway construction and repair costs, but little of the cost to construct or repair local roads.   Payments by motor-vehicle users fall short of government expenditures tied to motor-vehicle use by 20–70 cents per gallon of gas.  Zoning laws in many areas require that large, free parking lots accompany any new buildings. Municipal parking lots are often free or do not charge a market rate. Hence, the cost of driving a car in the US is subsidized, supported by businesses and the government who cover the cost of roads and parking.  This is in addition to other external costs car users do not pay like accidents or pollution. Even in countries with higher gas taxes like Germany motorists don't fully pay for the external costs they create.
This government support of the automobile through subsidies for infrastructure, the cost of highway patrol enforcement, recovering stolen cars, and many other factors makes public transport a less economically competitive choice for commuters when considering Out-of-pocket expenses. Consumers often make choices based on those costs, and underestimate the indirect costs of car ownership, insurance and maintenance.  However, globally and in some US cities, tolls and parking fees partially offset these heavy subsidies for driving. Transportation planning policy advocates often support tolls, increased fuel taxes, congestion pricing and market-rate pricing for municipal parking as a means of balancing car use in urban centers with more efficient modes such as buses and trains.
When cities charge market rates for parking, and when bridges and tunnels are tolled, driving becomes less competitive in terms of out-of-pocket costs. When municipal parking is underpriced and roads are not tolled, most of the cost of vehicle usage is paid for by general government revenue, a subsidy for motor vehicle use. The size of this subsidy dwarfs the federal, state, and local subsidies for the maintenance of infrastructure and discounted fares for public transportation. 
By contrast, although there are environmental and social costs for rail, there is a very small impact. 
Walking or cycling often have net positive impacts on society as they help reduce health costs and produce virtually no pollution.
Compared to other popular modes of passenger transportation, especially buses or trains, the car has a relatively high cost per passenger-distance travelled.  Motorists in the United Kingdom seem to spend on their cars an average of roughly 1/3 of their average net income,  while motorists in Portugal seem to spend 1/2 of their net income. For the average car owner, depreciation constitutes about half the cost of running a car,  nevertheless the typical motorist underestimates this fixed cost by a big margin, or even ignores it altogether. 
In the United States, out of pocket expenses for car ownership can vary considerably based on the state in which you live. In 2013, annual car ownership costs including repair, insurance, gas and taxes were highest in Georgia ($4,233) and lowest in Oregon ($2,024) with a national average of $3,201.  Furthermore, the IRS considers, for tax deduction calculations, that the automobile has a total cost for drivers in the USA, of 0.55 USD/mile, around 0.26 EUR/km.  Data provided by the American Automobile Association indicates that the cost of ownership for an automobile in the United States is rising about 2% per year.  2013 data provided by the Canadian Automobile Association concludes that the cost of ownership for a compact car in Canada, including depreciation, insurance, borrowing costs, maintenance, licensing, etc. was CA $9500 per year,  or about US $7300.
The Austrian philosopher Ivan Illich, a critic of the modern society habits, was one of the first thinkers to establish the so-called consumer speed concept. He wrote in his book Energy and Equity  published in 1974:
|“||The model American male devotes more than 1600 hours a year to his car. He sits in it while it goes and while it stands idling. He parks it and searches for it. He earns the money to put down on it and to meet the monthly installments. He works to pay for gasoline, tolls, insurance, taxes, and tickets. He spends four of his sixteen waking hours on the road or gathering his resources for it. And this figure does not take into account the time consumed by other activities dictated by transport: time spent in hospitals, traffic courts, and garages; time spent watching automobile commercials or attending consumer education meetings to improve the quality of the next buy. The model American puts in 1600 hours to get 7500 miles: less than five miles per hour [the consumer speed]. In countries deprived of a transportation industry, people manage to do the same, walking wherever they want to go, and they allocate only 3 to 8 percent of their society's time budget to traffic instead of 28 percent. What distinguishes the traffic in rich countries from the traffic in poor countries is not more mileage per hour of lifetime for the majority, but more hours of compulsory consumption of high doses of energy, packaged and unequally distributed by the transportation industry. ||”|
where is the distance travelled by the car and is the travelled time, i.e., the time elapsed during the travel.
Though, to assess the consumer speed, we must sum the amount of time the car owner strictly allocates to work to afford such travelled distance. Then the consumer speed is:
where is the time the driver needs to work, to afford doing that specific travelled distance using such car.
James (an example), a common car owner and driver who takes his car to get to work, spends totally (standing and running costs) on his car an average of €5000 per year. Considering James just uses his car to get to work and that one year has around 250 business days, James pays on average €20 per working day to afford his car. Consider the James' average net salary is €10 per hour; then James needs to work 2 hours per day just to afford his mean of transport to get to work, time strictly allocated to pay his car bills.
If he lives 20 km away from his workplace and he gets there in half an hour, then he makes 40 km per day during one hour (round trip). His kinetic average speed would then be:
Though, James needs on average 2 hours per day just to afford his car, working time budget strictly allocated for paying his car bills, so his consumer speed would be:
just 1/3 of his kinetic speed.
Car-Free Streets is a growing concept which aims to protects citizens by limiting the issues raised by cars. This is being introduced in New York, Paris, Rotterdam, and soon San Francisco. 
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"The industrialization of traffic".
excerpts from Energy and Equity; also collected in Toward a History of Needs
- Why Car-Free Streets Will Soon Be the Norm - CityLab