# Traffic

0th

Percentile

An experiment was performed in Sweden in 1961--2 to assess the effect of a speed limit on the motorway accident rate. The experiment was conducted on 92 days in each year, matched so that day j in 1962 was comparable to day j in 1961. On some days the speed limit was in effect and enforced, while on other days there was no speed limit and cars tended to be driven faster. The speed limit days tended to be in contiguous blocks.

Keywords
datasets
##### Usage
Traffic
##### Format

This data frame contains the following columns:

year
1961 or 1962.
day
of year.
limit
was there a speed limit?
y
traffic accident count for that day.

##### References

Venables, W. N. and Ripley, B. D. (1999) Modern Applied Statistics with S-PLUS. Third Edition. Springer.

##### Aliases
• Traffic
Documentation reproduced from package MASS, version 7.3-47, License: GPL-2 | GPL-3

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