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11

I don't have numbers on hand. But if you're after a cogent argument, I would point out that the car they drive has a far larger manufacturing footprint, even assuming it is manufactured in the local economy, which is rare. If it is, then was the raw steel manufactured there or shipped in? For that argument of theirs to be effective, they must start with ...


6

Has anyone done a carbon audit for a bicycle yet? I managed to find one on the Brompton website - "Manufacturing a Brompton bicycle creates 113kg of carbon". I have been unable to find any figures from other manufacturers. The Brompton is a steel-framed folding bike, so that figure may not be particularly representative. If so, are there any ...


4

Depending on your rim (bore diameter) you don't have the choice unless you are willing to tweak your bike a bit (or use an adapter). Cross-Country or Marathon Hardtails and racing bicycles usually use Presta aka Sclaverand or French Valve (at least we call it like that in Germany). This type of valve opens when you put the pump on it (after you opened the ...


2

"How is bicycle infrastructure designed and how does it evolve?"? Well, as the other answerers have suggested, the answer is "that depends." When I worked for the Bureau of Land Management, here in the U.S., I did recreation management for a broad scattering of federal public lands. Some of these lands were adjacent to cities. In the cases where we built ...


1

Assuming 113kg of carbon for manufacture of a bike this equates to 414kg of CO2. A car with an MPG of 40 emits 272g of CO2 per mile. This mean you would need to do 1500 miles on the bike to break even.


1

This information is never gathered correctly, corporations really don't want you to know the actual numbers, otherwise it would have a very negative impact on manufacturing. I own an older 91 GMC pickup truck, some greenies see me as a polluter, but I say I am not, I have owned the truck for 13 years, purchased used, keep it tuned and emissions test passes ...


1

The questioner is asking how does a town/city get its bicycle infrastructure. As I write I can feel the moderators cursor hanging over the 'close' button, so I will be brief... The Wikipedia page is a good place to start: http://en.wikipedia.org/wiki/Bicycle-friendly The 'carbusters.org' site might also be of interest to the questioner, particularly the ...


1

do cycle facilities piggyback on roads for autos? In Toronto the main types of bike route are: Bike lanes and/or 'shareways' painted on a few of the second-largest roads: so that a few of the major roads have bike lanes Recommended (mapped and sign posted) bike routes through minor, low-traffic, residential streets (which have lots of stop signs but ...


1

Looking at the Cycling Strategy for my local town, the intended evolution of infrastructure is: ensure that alterations to the highway network are designed to increase utility for cyclists or, at the very least, to not degrade the cycling environment enhance routes to schools and town and local centres ensure that cycle facilities are considered in all new ...



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