Originally Posted by
Prophead
It isn't, I used to do this drive every day. Most of the traffic on the M4 is going into London and most of the traffic on the M25 is going straight past the airport. If it was all going to/from LHR then the link roads would never be able to cope.
"
Most of the traffic on the M4 is going into London".
You say you used to drive this every day.
1 - how did you measure these asserted traffic flows?
2 - over what period did you measure?
3 - how many cars ended up at LHR, where did the other cars continue on to?