Deflector Islands are:
- Horizontal Speed Control Measures.
- Many times employed along with Neighborhood 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.
- Ideal for heavy pedestrian areas, residential areas, commercial
areas, and business districts.
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Typical Design:
- The extension into the roadway is variable depending on the existing
width.
- The design varies by neighborhood 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
measure while making a tight turn or negotiating the intersection.
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Placement Issues:
- 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.
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Approximate Cost:
- Installation costs of deflector islands start around $3,500 increase
depending on landscaping, land acquision, and design details.
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Comments:
- When designing a deflector island, considerable attention should be
given to aesthetics.
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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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