In the United States, bicyclists are regulated to ride single file in some states. In others, bicyclists are allowed to ride two abreast. I've traveled in many states, not knowing how it applied in some of them.
For those of you who ACTUALLY know the laws applying to this, I ask this:
Which specific states regulate bicyclists to ride single file?
Which states allow bicyclists to ride two abreast?
MODERATORS: If this belongs in the Vehicular Cycling forum, put it there.