Of course every car consumes more at 130 than at 90; i
mentioned two different models, with different frontal area and coefficient of
friction, not to mention transmission losses and gear ratios.
Loads of factors determine energy/fuel use . Take speed
variation, which is very relevant. Cruise control is a useful tool ,but you can
achieve efficiency with a steady foot (limited acceleration), keeping your
distance, and not braking.
Btw , video-meetings can also save a lot.
Don't confuse how a car happens to be geared with
energy efficiency. There is no possible way
that an optimally geared car can
consume more energy at 90 kph than at 130kph. Drag is the
dominant source of
resistance in this speed range, and it increases with the square of the speed.
a huge difference between 810 and 1690.
From: Stefan Langeveld
Sent: Oct 28, 2005 6:12 AM
Subject: RE: [NewMobilityCafe] Cut More
Emissions, the easy way
I oppose such a limit.
1. Fuel consumption and emissions vary
between models/engines , both could be lower for car A at 130 km/h than car B at
2. Occupancy. You can achieve far
greater reductions when 2 decide to decide to travel together.
difficult [impossible ?] to measure or limit the emissions per kilometer per
person, that's why some propose a crude speed limit.
sharing will work without new laws.
[Stefan Langeveld ]
From: Stephen Plowden
Sent: Thursday, October 27, 2005
Subject: Re: [Kyoto2020] Cut More
Emissions, Build a Stronger EU -
Something I am thinking of
doing once my current study is finished is to
launch a campaign for a
wordlwide maximum road speed limit of 90 km/h
with vehicles built to
match. Would that be supportd by cafe society?
> Cut More Emissions, Build a Stronger EU - Activists*Stefania** Bianchi
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