I'm working on a map that is showing a number of routes (cycling, mountain biking and walking) in a mixed urban/rural/forest environment. Most of it is no problem, but I'm a bit stumped on the inclusion of "fast bike routes". Bit of a tricky concept to explain, it's a network of bike paths in the city that are meant for general transportation. I.e. they're not chosen for being nice or scenic, they just get you from A to B and so are important to people riding bikes to commute, or to go about their daily errands, but for the more recreation oriented cyclists (the target audience of this map) they're not of primary importance. In fact, they're (probably) not even signposted as being special.
So for my "regular" routes I've opted to use clearly colored lines, using different dash patterns to distinguish between cycling, mountain biking and walking routes. When routes overlap I've drawn them parallel (sometimes up to 4). I could do this for the fast bike routes as well but that would promote them to a status similar of the touristic routes, which is not really what I want to do.
I've tried to display them as wider lines with transparency, but I'm not very happy with how this looks:
Any suggestions would be most welcome.