To improve road safety for cyclists, Seattle officials will be painting bike green lanes at four busy Seattle intersections this Spring: Dexter at Denny Way, both ends of the Fremont Bridge and North 145th Street, where Shoreline's Interurban Trail enters the city limits. Portland has used blue-colored bike lanes since the 1990s and found motorists yielded to bikers more often. (Many European cities, like Copenhagen, also use them.) If the green lanes prove successful, the University Bridge near the UW will be top of list for the next round of improvements, say officials.