I'm now confused as to whether 'undertaking' is legal or not, and under what circumstances. In York there are many narrow kerbside cycle lanes, a large proportion of which have faint dotted or solid demarcation markings, and are faint and extremely narrow. In other words they give you no confidence at all. At the same time it's reasonable to assume that these belong to cyclists and no other vehicles?
If the line is constant then it is supposed to be just for bikes, if the line is dashed/dotted then it is advisory and cars can pull into it if needed. It isn't enforced and drivers simply don't know so both are treated as optional. The colours are also optional as the only marking that are legally mentioned are the line to show the side of the lane and then the picture of a bike at reasonable distances along the lane to show what it is for, in london I have seen green red and blue cycle lanes as one council decided to make them match the bus lane paint they had and the blue cycle super highways and green regular ones.
In some places the "cycle super highway" just becomes a bike picture in a blue square dotted about. To give an example this is taken at the lights about 100m short of clapham south tube station if you cycle along the common from clapham common tube station, the pavement as you can see is more than a lane of traffic wide and could accomidate a cycle lane but doesn't and the other side of the road is clapham common which again could loose a meter for a cycle path but doesn't.
Also this seems to have been around since march. It isn't an impossible or secret design of truck but it is smaller than many used so most will need 2-4 to do the job of 1 and they still aren't good for moving skips or other things coming from the building site traffic issues, delivering to supermarkets and highstreet shops I really see no reason other than the potential extra costs in drivers/trucks to hold people back.
London Cycling Campaign | LCC challenges construction industry to adopt our Safer Urban Lorry to reduce lorry-cyclist deaths
I can't really offer a solution but I know the "latest safety equipment" to be taken up by lots of trucks and tfl buses is this...
I'm entirely on the ropes about this one, on one hand I admit some cyclists take the gaps they shouldn't but on the other hand I find it insulting. Should I have a sign on my back with "motorists stay right"? If I did I can imagine the horns going behind me and inch close passes by motorists it rubs the wrong way.