A long time requested feature, bike directions, have been added to Google Maps. Both the Google Blog and Google Lat Long Blog have details about the addition.
First, here is a video demo:
- Dark green indicates a trail;
- Light green indicates a dedicated bike lane along a road;
- Dotted green indicates roads without bike lanes but are more appropriate for biking, based on factors such as terrain, traffic, and intersections.
To try it out, go to http://maps.google.com/biking and to submit more biking routes or report issues, go here.
Forum discussion at Google Maps Help.