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- Newsgroups: uk.transport
- Path: sparky!uunet!paladin.american.edu!howland.reston.ans.net!sol.ctr.columbia.edu!daniel
- From: daniel@scs.leeds.ac.uk (D N Crow)
- Subject: Re: Speed limits
- References: <1993Jan22.170111.8420@praxis.co.uk>
- Originator: daniel@csgi60
- Sender: nobody@ctr.columbia.edu
- Organization: The University of Leeds, School of Computer Studies
- Date: Sat, 23 Jan 1993 19:53:01 GMT
- Message-ID: <1993Jan23.195301.1166@sol.ctr.columbia.edu>
- Distribution: uk
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-
- In article <1993Jan22.170111.8420@praxis.co.uk>, martin@praxis.co.uk (Martin Croxford) writes:
- |> >
- |> > So, do you propose having massive limit signs that list all the various
- |> > different limits under different coditions. Or maybe change all the limit
- |> > signs for changing displays.
- |>
- |> I don't propose "having massive limit signs" (tho "changing display"
- |> signs are an interesting possibility). I am trying to make the point that the
- |> speed limit signs are not necessarily an indication of the safest maximum
- |> speed.
-
- You are quite right, at least in principle, but we all unfortunately have to
- live in the real world. It is certainly true that speed limits are not
- necessarily (or even often) the maximum safe speed for a given set of road
- conditions, but what practical (and that includes reasonably cost effective)
- measures could propose to have altering speed limits. Consider:
-
- If speed limits on roads in general varied according to conditions (be they
- amount of traffic, time of day, weather, whatever), I would imagine it would
- be very difficult to frame effective legislation to prevent *either*:
-
- a) Requiring too much of the police (I doubt they would want to have to make
- the day-to-day judegment calls a=on this issue, they have plenty enough to do
- already). Ask the police, they tend to prefer to enforce clear-cut laws than
- ones they have to make judegments about. Especially on this scale.
-
- *or*
-
- b) Making a defence of "but I thought it was sensible, even if the police
- didn't" possible. This would be disasterous (in my opinion) for road saftey.
-
- |>
- |> In an ideal driving world drivers would be penalised for driving with
- |> excess speed for the conditions, rather than just "speeding". Cameras
- |> will faithfully record evry vehicle that breaks the speed limit - how much
- |> better if the camera could faithfully record every vehicle that is
- |> travelling with excessive speed.
- |>
-
- This is clearly true, and equally clearly not practical. Even if we could
- afford this sort of technology, how could you get agreement on what is a
- reasonable speed for a set of conditions. I couldn't imagine being able to
- frame it in law to cover all situations (any lawyers care to comment on this?)
- and I would imagine that it would lead to far *more* prosecutions for breaking
- "limits": evidence seems to suggest many drivers consitently over-estimate
- what they can safely do in their vehicle.
-
- |> Training all drivers to the level that police drivers are trained would do
- |> more for road safety than rigorous application of the law.
-
- Almost certainly true. Can't see it happening: imagine the expense, but I
- certainly wish it was true.
-
- The other issue in all this is how you factoe road-worthiness of the vehicle
- into the equation of what is an appropriate maximum speed. Ouch.
-
- --
- Dan Crow
- daniel@scs.leeds.ac.uk
-