dee dee wrote:jamesup wrote:St georges road will be a great deal more useful once connected to Westminster Bridge
but not good for the kids who will still have to endure the increased pollution the cycle lane has caused
Zoe wrote:The cars cause the pollution, not the cycle lane. Also, the traffic is worse in the area because of E&C, not the bike lanes.
dee dee wrote:This is often said but rarely (never?) backed up by evidence. Do a bit of Googling and you'll see that like many things in the real world, the relationship between vehicle speed and harmful emissions is rather complicated, especially when you're considering a mass of vehicles in an urban environment rather than one vehicle on a test track.instead of the traffic moving along at Georges road as it did before it now sits in a queue of traffic from St Georges Cathedral to the Elephant at a stand still or moving very slowly and that is worse for air pollution.
Sandgrown Dave wrote:Try for instance this way of looking at it:
Take a given stretch of road over a given period of time. Whether vehicles are moving at typically slow city centre pace or at a standstill, roughly the same number of vehicles will fit into that stretch of road. ....
....I don't claim that's a perfect argument (as I said, the reality is complex) but it demonstrates that it's not self-evidently obvious that slower or stationary traffic equates to worse air pollution.
Ivanhoe wrote:I didn't.Tedious that these sorts of points always have to be expressed as a battle between motor traffic and bicycles.
Ivanhoe wrote:It's not about that either. Buses aside (and not even 100% true for them), there are not a fixed number of vehicles to traverse the stretch of road under discussion. Real traffic doesn't behave that way. Especially over a long period of time, it tends to self-regulate. Provide more capacity and traffic increases to fill it; constrain it and the opposite is observed.It's not about the number of vehicles that can fit on a given stretch of road.
100 buses set off on their route. Old road layout means ...
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