Citing multiple experiments that demonstrated positive operational effects for both bicycle riders and other road users, with no notable negative effects, this approval allows states to apply for approval to use coloring in bike lanes. This Interim Approval does not make the use of green-colored pavement mandatory however.
Here’s more info on this decision from FHWA, including the research that went into making it.
What do you think? Is this an improvement for bicyclists in your eyes?