Title: Time and motion: how limited travel time constrains mobility
Abstract: National Travel Survey data for the years 1972-2005 has shown that average distance travelled per person per year increased by 60%, average trip length increased from 4.7 to 6.9 miles and the number of cars increased from 11 to 27.5 million. Despite this, the average travel time changed very little. The growth in travel over the period is because of the higher speeds that have become possible, due to improvements in the transport vehicles and vehicles. The implications of travel time invariance are discussed. Road improvements that increase speed will result in greater distances being travelled. It was argued that policy and operational measures that increase speed should be avoided unless they increase access. Uncertainty of arrival time has a greater effect on drivers than congestion. The development of navigation devices that predict journey times would help optimise the efficient use of the road network by making clear the alternative to using the system at times of peak usage. This effect would be similar to that of road pricing.
Publication Year: 2006
Publication Date: 2006-10-01
Language: en
Type: article
Access and Citation
Cited By Count: 1
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