**Call for suburban speed cuts
**

This article looks at the levels of support for reducing the speed limit from 60km/h to 50km/h in residential areas. It would be well coupled with an article appearing in The Mercury on the 7th of April, page 1 and 2 called "

The article (Call for suburban speed cuts) deals with a number
of mathematical and numeracy issues. It would be of value to discuss
with students the ratio km/h and how 60km/h could be described
in different units, eg. m/s. The statistics also offer an opportunity
for discussion of survey results conducted by the RACT and the
Council as to whom the sample represents and excludes. The council
reported letters received in regard to the change of speed limit
were *almost* 100% in favour of automatic loss of license
in some circumstances. What is almost 100%? Is it 98%, 90%? This
would be an interesting discussion to have with students.

The article refers a paper by 'The Tasmanian Road Safety Council. It would be interesting to discuss with students the kind of mathematics that would be involved in the report. For example you may expect some graphs, tables, use of percentages and ratios.

Another task of interest would be investigation of the stopping
distances at different speeds, and how these would affect a real
life situation. The distances could also be investigated graphically,
that is speed versus stopping distance. Students could research
the stopping distances for 40km/h (which is discussed earlier),
100km/h and any other speeds found in your local area. Why do
we want people stopping sooner?

(Written by Janene Rosewall, BTeach student, University of
Tasmania, 2001)

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