• Formed by barrier islands that block certain movements on approaches to an intersection.
• Good at reducing unwanted through traffic by altering specific movements at an intersection.
• Also known as forced right/left turn islands.

How are Diverters designed?

• Designs can vary significantly depending on the installation location.
• Typically, a four-way intersection is divided by a barrier (diagonally across the intersection) that forces the driver to go in one direction.

• Best if used on residential streets at intersections with larger collector streets. This allows the larger street to accommodate the diverted traffic and helps to cut down on the number of individuals that might illegally circumnavigate the device.
• Emergency vehicle service is not greatly affected by forced turn islands since the emergency vehicle can circumnavigate the device or the device can be designed to be mountable.
• Installation costs for a diverter is around $3,000 to $20,000 and up depending on the size and design features.

• Should be installed only with strong community support since they restrict access for neighborhood residents.
• Forced turn islands can be installed temporarily with low costs to test the effectiveness. The trial period should last 6-12 months.
• When designing diverters, proper signage is necessary and considerable attention should be given to aesthetics.