If you click on a section of the generated route a dialog box will appear allowing you to rate that section's perceived safety on a scale of 1-7, this will affect future generated routes. Also the system tends to prefer residential streets and cycleways over major roads, and prefers roads with bike lanes or signed bicycle routes.
OpenStreetMap
Discussion
Puna mula sa wieland noong 22 Marso 2010 sa ganap na 08:58
How do they know, which way is safer?
Puna mula sa andrewpmk noong 23 Marso 2010 sa ganap na 03:51
If you click on a section of the generated route a dialog box will appear allowing you to rate that section's perceived safety on a scale of 1-7, this will affect future generated routes. Also the system tends to prefer residential streets and cycleways over major roads, and prefers roads with bike lanes or signed bicycle routes.
Puna mula sa wieland noong 23 Marso 2010 sa ganap na 21:06
@andrew: Thanks