means of tranport expressed in percentage and traffic speed in London from 1970 to 2010

The two line graphs outline changes in means of transport used by Londoners over a 40-year period, from 1970 to 2000 and the modifications in traffic speed in London. According to the lines, traffic on roads by car and bus tends to diminish while alternative means of transport, such as subway, bycicle and foot are experiencing a positive trend. Travelling by car was far the most preferred way to commute to work for Londoners in 1970 (just over 40%) and the trend had its peak in 1990 to about 50%. After that, a marked decrease to approximately 33% in 2010 can be noted. Over the years, travelling by bus had an overall decline. However, two patterns can be noted: between 1970 to 1990 a steady decline from 23% to 18% and since 1990 a lull. People commuting by subway diminished from 1970 to 1990, with a trough of approximately 28% and subsequentely rose to 36% in 2010, interestingly more than citizens travelling by car. People moving by bycicle and on foot grew steadily to reach 8% and 4% respectively. Traffic speed of London "A" roads experienced a steady decline from 24mph in 1970 to 15mph in 2010. From the two graph, we could assume that traffic speed is one of the factors that led Londoners to consider alternative means of transport, mainly subway.