The idea of representing cycle routes like tube lines was developed by cyclists in Bristol and Bath. They show connections clearly by simplifying geography so are not meant for navigation but give an overall idea of the state of the network.
The most accessible routes are drawn in blue and then via cyan, yellow , orange to the most hostile in red. The call is “turn the map blue ! “.
OK ish (mostly thanks to Royal Parks ) apart from around Twickenham and Richmond-Mortlake but the network is only as good as its weakest link and some of the weaknesses have been glossed over in the above picture. From the collision rate shown in the LIP map Twickenham Station-Riverside should be Red as should Upper Richmond Rd.
The A305 / A311 is the direct link between “Village Centres” and so will be used for cycling although it is hardly to be recommended to the inexperienced. I have used a slightly thinner line. The thinnest lines are for routes that avoid traffic at the expense of being very roundabout ; fine for recreational rides.
This is an ongoing project – for the latest version see This Link
The “real” map corresponding to this is HERE To make the routes easier to follow I have used consistent colours rather than quality grading. Again the A305/A311 is narrower.