open street map trunk roads color

[Francesco Bettella]

hello,

first of all, let me congratulate you for the wonderful work you've carried out with openstreetmaps. 

now to the point. if I may suggest a possible improvement, I find that the color of trunk roads (green) often does not contrast well with the background. I would rather use something like purple or violet, which I think would also fit better into the progression from yellow (secondary roads) to blue (motorways).

best,
Francesco