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SPEED
HUMPS
Click
here to view a standard layout for a Speed Hump
Speed humps
are paved (usually asphalt) and approximately 76 to 102 mm (about
3 to 4 in) high at their center, and extend the full width of
the street with height tapering near the drain gutter to allow
unimpeded bicycle travel. Speed humps should not be confused with
the speed "bump" that is often found in mall parking
lots. There are several designs for speed humps. The traditional
3.7-m (12-ft) hump has a design speed of 24 to 32 km/h (15 to
20 mi/h), a 4.3-m (14-ft) hump a few miles per hour higher, and
a 6.7-m (22-ft) table has a design speed of 40 to 48 km/h (25
to 30 mi/h). The longer humps are much gentler for larger vehicles.
(Source: www.walkinginfo.org/)
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Temporary
Installation
Rubber based speed hump
Easy to setup and remove
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Permanent
Installation
Standard residential speed hump
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PROS
1.
Relatively cheap to install.
2. Effective at reducing speeds.
3. Effective at reducing volumes.
4. Temporary versions exist.
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CONS
1.
Not suitable for sharp curves or steep grades.
2. May impact buses.
3. May create delays for emergency response vehicles.
4. May increase traffic noise.
5. May create drainage problems.
6. May divert traffic to adjacent roads.
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Summary
of Effectiveness
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Volume
Reduction
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Possible
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Speed
Reduction
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Yes
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Safety
Improvement
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Possible
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-
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-
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Streets
to Use On – Collector, Local
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Local
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Use
on Bus Route
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No
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Use
with Curbs and Gutters
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Yes
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Spot
or Area-wide Use
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Both
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-
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-
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Emergency
Service Access Issues
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Yes
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Impacts
on Arterials
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Yes
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Change
in % Trucks
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Yes
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Environmental
Changes
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>
Noise
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-
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-
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Dependence
on Enforcement
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No
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Level
of Violation
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N/A
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-
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-
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Aesthetics
and Landscaping
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Eyesore
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