Cykelflödesvariationer i Stockholm och Göteborg: delrapport inom SAMKOST 3

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The purpose of this project is to clarify the possibilities and the need for a pilot study aimed at measuring the marginal cost of congestion on bicycle paths. The goal of the measurements are exclusively to quantify the value of the delay caused by one further cyclist being present on the bicycle path. Ultimately, the goal is to be able to evaluate measures to broaden or otherwise improve the bicycle infrastructure.

This memorandum describes variations in cycle flow over a longer period of time, over one year and over a day (during months and days with high flows) in Stockholm and Gothenburg, with the aim to estimate when measurements should be made of the extent and intensity of significant congestion on bicycle paths.

Cycle flows vary by approximately a factor of 4 in Stockholm during the year in places with large flows and slightly less in Gothenburg, about a factor of 3. During peak hours, cycling flows show large variation during a day with shorter periods of high flows in the morning and afternoon.

The presence of costly congestion can therefore be expected to be quite short in Sweden's two largest cities. An example indicates that at 20 percent of all bicycle passages across the Liljeholmen bridge in Stockholm, the cyclist experiences high levels of presence of other cyclists. However, this example is not claimed to be representative either this or other locations in the inner city of Stockholm.

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