Denver’s new 15th Street bike lane includes green and red painted sections, which help to remind car drivers to watch for cyclists. Such green-painted bike lanes have become common around the US in recent years, but different places use different colors. Here are some examples.
 Dark green. Used in Washington and New York. |  Copenhagen’s blue. Photo by Steven Vance. |
 Amsterdam’s dull red, also seen in Vancouver and many other cities. Photo by Scott Lowe. |  Madison’s bright red. Photo by benet2006. |
