[Gllug] [OT] Times Article on ABD was Fighting a virus

[John Hearns]

John G Walker wrote:
> 
> Clearly bus lanes also make a difference. But a moment's thought will
> tell you that the introduction of bus lanes will also cause congestion
> in the other lanes (same amount of traffic in a smaller space). 

Not so. It is a matter of impedance matching (hey - we're veering closer 
to topic here). If there is a hold-up or slow-up further down a route 
then no matter how many lanes you have - ten, twenty, thirty then 
traffic will still come to a grinding halt. All you create is a wider 
car park.
I will give you a for instance - Lower Road in SE16 is always 
chock-a-block in the evening rush hour, with cars going south. There is 
a bus lane on the left. Talking away that bus lane would make no 
difference to congestion - there is a line of cars stretching from the 
Jamaica Road roundabout down to Greenwich. Taking away the bus lane 
would allow one more lane of stationary cars.

And take a look at the famous M4 bus lane. It is indeed a bus lane, but 
its real purpose is an impedance match between the 3 lane section of the 
M4 beyond Heathrow and the 2 lane M4 elevated section. Stops 3 lanes of 
traffic piling up at the 2 lane elevated section.


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