Directional airport signs with black lettering will always be on the left side of the taxiway before the intersection, according to the FAA. They are arranged from left to right based on their ...

As part of the directional conversion, DOT also added lane markings, ... All other signs, including one-way signs and "No Left Turn" and "No Right Turn" signs, will remain beyond the 90 days.

The speed at which sign language users understand what others are 'saying' to them depends on whether the conversation partners are left- or right-handed, a new study has found.