American Traffic Safety Services Association provides safety information and products for improving roadway safety.
BikeTV has a short video showing the installation of "sharrows" in San Francisco. Sharrows are directional indicators that are used when bicycles and motor vehicles share the lane. They give the bicyclist an indication of where to ride on the roadway. They are most typically used on roads that have bicycle lanes in those spots where the bicycle lane disappears momentarily. I rode several streets in San Francisco last fall that had these markings and they work very well.
AASHTO has issued proposed new guidelines (draft) for marking bicycle routes. The guidelines include a verbal description of how bicycle route signs should be used and then sample sign layouts. The guidelines look very good and should become a standard that can be used across the state and across the country to create uniformity and instant recognition of bicycle route information. The proposed new signs include direction, distance, and destination ("Troy 3 ->" with a small graphic of a bicycle) rather than the old AASHTO style signs which simply said "Bike Route".