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SPEED HUMPS
A speed hump is an area of raised pavement, 3-1/2" high by 12' long by the width of the roadway, having a comfort speed of between 10 and 15 mph. Speed humps are used to reduce vehicle speeds in order to increase pedestrian and traffic safety. Speed humps are typically spaced between 250 and 750 feet apart, depending on traffic characteristics, and are designed to allow snowplows to smoothly traverse them with no damage to the hump.
The Process:
- Lay out and mark the area for the installation of each speed hump.
- Cut heel transitions for tying in the speed hump with the existing pavement surface.
- Tack coat the existing pavement surface area and apply a hot mix surface course asphalt.
- Form and compact the asphalt into the designed speed hump configuration, the width of the roadway, approximately 22'.
Not included in the pricing of speed humps is the placement of pavement markings on the street with broad white stripes and black-on-yellow diamond-shaped warning signs that must be posted at or near the hump. These signs and markings are required for liability reasons to provide notice of the hump to approaching motorists. They are particularly important during reduced visibility conditions, such as at night or when the road is covered with snow. Speed humps are designed to allow for normal roadway drainage. However, in certain cases, on older pavements without curb and gutter, care must be taken in the placement of speed humps to ensure proper drainage.
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