Papers
Network-wide speed-flow curves
published in the London Analytics Research Journal, issue 4, ISSN 1756-025X
The network as a whole behaves in the same way that a single link does, with a measurable capacity, and exhibits a speed-flow relationship, based on empirical observations of network speeds and network flows, which follows the traditionally hockey-stick curve that represents the behaviour on individual links.
LikeCycle Flows and Weather: an algorithm for adjusting for ambient temperature and rainfall in cycle counts
published in the London Analytics Research Journal, issue 3, ISSN 1756-025X
This paper reports a successful estimation of the coeffficients to adjust observed cycle counts for changes in ambient temperature, rainfall, weekends, and bank holidays.
On Greater London's main roads, which carry a significant proportion of London's cycling, cycle flows rise on average by 1.8% for each degree Celsius increase in mean temperature on working days, and by 2.7% for each degree Celsius at weekends and bank holidays.
The presence of rainfall typically reduces flows by 9.1% on a working day, and by 13.9% on other days. This reflects a higher proportion of discretionary ("fair weather") leisure travel at weekends, in contrast with utility (typically commuter) cycling during the week.
The Mode Shift Benefit Matrix: Money for Walking
published in the London Analytics Research Journal, issue 2, ISSN 1756-025X
This paper was presented at the 2005 Money for Walking conference, organised by Living Streets and the Corporation for London.
This paper presents the mode-shift benefit matrix: a solution to the problem of how, cost-effectively, to calculate the economic value of the costs and benefits of a scheme that is designed to cause a modal shift.
Cycling, Gender and Critical Mass
published in the London Analytics Research Journal, issue 1, ISSN 1756-025X
In this paper, I examine the evidence for the proposition that places with high cycling tend to have a higher proportion of female cyclists. Positive correlations supporting this are found within two separate data sets: the 2001 Census, and the London Area Travel Survey 2001. Comparisons are made to results from the Dutch annual national travel survey, which shows high cycling figures nationally and by individual province, sustained high modal share across all ages, including the over-75s, and a consistent balance between the numbers of male and female cyclists. Recent increases in the amount of cycling in Greater London (40% growth on the main road network, the TLRN, between 2001 and 2004), have been accompanied by an increase in the proportion of women within the cycling population, from 27% in 2001 to 40% in 2005
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