Faintly marked kerbs on very fast or tricky sections of the course are almost impossible for the rider to detect, particularly in fading evening light or when dappled leaf shadows camouflage them.
It is a simple solution and will prevent calamities. Put the pressure on now and make sure that they PAINT THE KERBS.
Have a look at state of the kerb nearest to camera here, for example. The camouflaging effect of the dappled sun can also be seen clearly. Imagine trying to spot the kerb here at 150mph+!


