Portland has an extensive neighbourhood greenway network(external link). In Portland the posted speed limit for these neighbourhood greenways is generally 20 mph (32 km/h) and they strive for an average volume of less than 1500 vehicles per day (vpd). From 2014, Portland has been installing signs on neighbourhood greenways to “help people better understand the type of road they are using”.
An assessment of how people use the neighbourhood greenway system(external link) has been carried out by the Portland Bureau of Transportation. It is noted that Portland have done some work on how people use the neighbourhood greenway system.