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Traffic Calming Devices →
Horizontal Speed Control Devices |
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| Deflector
Islands |
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What are Deflector Islands?
- Many times employed along with Roundabouts.
- Used at intersections to reduce the roadway width and cause a vehicle
to deflect from a straight path.
- Able to be integrated with crosswalks to provide a safer pedestrian
crossing by reducing the crossing distance, improving the line-of-site for
pedestrians, and making pedestrians more visible to drivers.
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How are Deflector Islands designed?
- The extension into the roadway is variable depending on the existing
width.
- The design varies by neighbourhood and design purpose.
- The deflectors can be designed to be partially mountable by larger
vehicles. This means that larger vehicles can ride over part of the device
while making a tight turn or negotiating the intersection.
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Where are Deflector Islands placed and how much are they?
- Ideal for heavy pedestrian areas, residential areas, commercial areas,
and business districts.
- Deflector islands can be used at midblock locations or at
intersections.
- Deflector islands are most effective at reducing vehicle speeds when
several are used in a neighborhood in series or combined with other
measures.
- Installation costs of deflector islands start around $3,500 increase
depending on landscaping, land acquisition, and design details.
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Advantages
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Disadvantages
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- Can reduce speeds.
- Can improve pedestrian safety by
shortening cross distances at intersections.
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- Can be expensive if drainage needs to be installed.
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Deflector Island Issues & Comments
- When designing a deflector island, considerable attention should be
given to aesthetics.
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