In 2011 the Mineta Transportation Institute released the report "Low-Stress Bicycling and
Network Connectivity". It examined the practicality of a bicycling network being defined as "a set of streets and paths that people consider acceptably safe for bicycling". These streets already exist and in urbanized areas actually comprise the majority of streets. The problems lies in the lack of connectivity of these mostly local streets.
The resulting model is called Level of Traffic Stress (LTS) and it categorizes all streets, and intersections into 4 levels of bicyclists comfort :
LTS 1 suitable for children
LTS 2 acceptable to traffic intolerant adult (interested but concerned)
LTS 3 OK for experienced bicyclists (enthused and confident).
LTS 4 Highest Stress (strong and fearless)
After the jump find out how you can create a simplified LTS assessment for your own community on Google Maps