warning motorists not to block a box junction In
Australia,
New Zealand and the
European Union (excluding Ireland), road rules state that every intersection is a box: that is, the driver may not enter any intersection unless there is clear space on the other side, whether it is marked or not. In the EU this also applies to junctions with a minor road within the waiting area of a
traffic light on the major road. The same rule applies at every intersection in
Russia. Several
U.S. states have enacted laws intending to decrease gridlock at intersections, railroad crossings, and marked crosswalks which prohibit motorists from entering any of the three until they are certain their vehicle can clear it, as recommended by
Uniform Vehicle Code section 11–1112. Examples include
California,
Florida,
New York, and
Ohio. No special road markings are used to indicate this rule, but some governments post warning signs to increase awareness of the law at problematic intersections. ==References==