A diverter is an island built at a residential street intersection that
prevents certain through and/or turning movements. Diverters affect people
living in the neighborhood more than any one else. Therefore, diverters
should be considered only when less restrictive measures are not
Four types of diverters are: diagonal, star, forced turn, and truncated.
A diagonal diverter breaks up cut-through movements and forces right
or left turns in certain directions. A star diverter consists of a star-shaped
island placed at the intersection, which forces right turns from each
approach. A truncated diagonal diverter is a diverter with one end open
to allow additional turning movements. Other types of island diverters
can be placed on one or more approach legs to prevent through and left-turn
movements and force vehicles to turn right.
As with other traffic management tools, diverters must be used in conjunction
with other traffic management tools within the neighborhood street network.
Any of these diverters can be designed for bicycle and pedestrian access.