Tim Lamb formulated on Friday :
No, they usually have double yellow lines along them too. I used to make good use of one in particular, that ran from close to the Leeds city centre, all the way out to the next centre. It was a well marked part time lane, 15-30 to 18:00. There was always a congested L2 and only an occasional bus in L1. So I used L1 all the way and would have a clear steady run, except when there was a bus at a bus stop. There, I would simply pull into a gap in L2, to get past it. I would sometimes even get flashed by those daft enough to queue in L2 with the rest of the sheep.
Driver see the thick white line, but none bother to read the signs - it was always thus.