Is it an algorithm?

How does the system decide on where to direct a route once a user asks for a 'safe' or otherwise route? 

Is there are hoard of Tolkien like little people scribbling away in a attic or outbuilding once a route is requested, or is there a library of routes already predetermined by the same scribblers - or possibly a more advanced little people from another culture?

Improving route viewing

Using the excellent route provided by this site, I note that the cue will often simply state something like: 'Leave on minor road' or 'Bear L (left) on minor road', and 'Fork R (right) onto minor road'. I have found this leads to confusion since the actual instruction is somewhat tenuous. 

So, to improve the cue (I use cue sheets rather than any GPS device - easier to read and it is better with the route descriptions) I go to Google Maps UK, then Street View then take look at the actual location and note on my cue sheet any distinguishing features such as 'big white house' or 'painted sign' or anything standing out at the junction to confirm I am on the right road.

How do I print my route map

I want to print the route map I have created but seems to be no way to do this. Any ideas?

Thanks

Imperial measurements

How can I get the routes to show measurements - miles, elevations - in Imperial units?