Road traffic accidents and speed limits experiment on motorway in Sweden

In this experiment, data were collected on the same days in two consecutive years, and speed limits were sometimes enforced in either. The purpose of the analysis is to analyse the effect of the traffic limits.

sweden

Format

a data frame in long format of 184 observations on the following variables

accidents

integer; daily number of accident

day

integer; day of the experiment, ranging from 1 to 92

year

integer; year of the measurement, either 1961 or 1962

limit

logical: was a speed limit enforced?

References

Svensson, A. (1981) On a goodness-of-fit test for multiplicative Poisson models. Annals of Statistics 9, 697–704.