The 401 in KW is weird. It goes from 2 lanes (there is ALWAYS a lane closed off in some place or another, and has been the case ever since I moved to London in 2005) to 4+1 lanes (4 lanes + HOV). Smooth flowing then bottlenecks. And those goddamn orange and black road pylons...lord how I hate those things (which hang around for months and sometimes even years after projects are completed).