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Traffic Calming Devices →
Vertical Speed Control Devices |
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| Raised
Intersection |
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What are Raised Intersections?
- Whole intersections that are normally elevated
80 millimeters with ramps
on all approaches.
- Designed to draw attention to the intersection and pedestrians so that
vehicles and pedestrians can traverse them safely by reducing vehicle
speeds on all approaches.
- Designed to work well at intersections with high vehicle-pedestrian
conflicts.
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How are Raised Intersections designed?
- Raised intersections are flat raised areas elevated
80 to 150 millimeters above the surrounding street grade. The intersection and all
adjoining crosswalks are raised. Ramps on the approaches to the
intersection are similar to those used on speed tables.
- A 15mm curb face should be retained at all
crosswalk locations.
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Where are Raised
Intersections placed and how much are they?
- Raised intersection are appropriate for
areas where pedestrian activity is encouraged.
- Ideal for residential applications,
commercial areas, and business districts.
- Installation costs for a raised
intersection vary between $15,000 and $60,000 depending on drainage
issues, size of the intersection, and aesthetic features.
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Advantages
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Disadvantages
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- Creates a more noticeable pedestrian crossing
- Can reduce vehicle speed
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- Potential slight increase in road noise
- Expensive to build and maintain
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Raised Intersection Issues & Comments
- Avoid placement on arterials.
- Local emergency services should be considered when determining
placement. On average, raised intersections cause a 4 to 6 second delay
for emergency vehicles.
- When raised intersections are integrated with the curb (same height as
the curb), the transition from the sidewalk to the raised cross walk
should be denoted by a slight lip or other device to warn the visually
impaired.
- When designing raised intersections, considerable attention should be
given to aesthetics.
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