37.6% had no vehicle available to them for their commute. Since 2006, driving alone increased at the expense of carpooling and public transportation. According to the 2016 American Community Survey, 69.7% of working Los Angeles (city) residents commuted by driving alone, 8.7% carpooled, 9.2% used public transportation, and 3.5% walked. About 2.8% commuted by all other means, including taxi, bicycle, and motorcycle. About 6.1% worked at home. Concerns Air quality Los Angeles is strongly predisposed to accumulation of smog, because of peculiarities of its geography and weather patterns. The millions of vehicles in the area combined with the additional effects of the Los Angeles/Long Beach complex frequently contribute to further air pollution. Los Angeles was one of the best known cities suffering from transportation smog for much of the 20th century, so much so that it was sometimes said that Los Angeles was a synonym for smog. In particular, the entire area in between Los Angeles Harbor and Riverside has become known as the "Diesel Death Zone". Sidewalks The city has about of sidewalk. Many are perilous or impassable due to lack of maintenance to those who have disabilities that affect their mobility. In 2015, the city committed to spending $1.4 billion over the next 30 years to resolved a class-action lawsuit citing violations of the Americans With Disabilities Act by fixing other barriers to full and safe access to city streets. See also Asbury Rapid Transit System (1935-1958), small, privately owned bus system Freeway system of Los Angeles Great American Streetcar Scandal, conspiracy theory on demise of Red Car system History of Pacific Electric (Red Car) References External links City streets that existed in 1903-04 but are no longer extant Los Angeles Los Angeles, California