In message , at 00:46:35 on Fri,
10 Sep 2004, John Rowland
remarked:
If there isn't enough width for a traffic lane and a cycle lane, then
perhaps putting a contraflow cycle lane up it isn't a great idea!

The thing there isn't room for is the island between the traffic lane
and the cycle lane on which to put a traffic sign. But yes, some of
these contraflow lanes are in quite narrow streets where the slightest
obstruction causes cars to encroach on the lane. But as the lesser of
two evils (the greater being no lane, but cyclists using the road
contraflow anyway) perhaps it's safer.
--
Roland Perry