In the United States, Google Maps now beginning to offer step-by-step bicycling directions, bike paths displayed directly on the map, and a new layer that overlays trails, bike lanes, and prominent cycling-friendly roads for safer riding.
The new service allows you to map turn by turn cycling directions, see the trails and bike lanes directly on the map, and drag and drop points to customize your route. Now you can avoid congested streets and large climbs on your commute. Check out this detailed video of the features. Happy Riding.