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TIPS & FAQ's
 Community
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Speed Humps
Speed humps are
used to control speeds
on residential streets. Los Angeles Department of Transportation (LADOT)
engineers have found that speed humps can lower
critical (85th percentile) speeds on residential streets to within a range between the speed limit
and five miles per hour above the speed limit.
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Speed humps are
different than speed bumps, which are found in parking
lots. Unlike speed bumps, speed humps are longer and flatter. LADOT's Type I speed
humps are slightly less than three inches high, and are 12 feet long.
Type II speed humps (a.k.a. speed tables) are similar to speed humps, but are
22 feet long and are applied on qualifying streets with traffic flow or slopes
that are within higher thresholds.
City of Los Angeles residents sometimes request speed
humps on streets in their neighborhood. LADOT provides
speed humps as a community
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Residents with concerns about excessive speeding and interested in speed humps
may request the appropriate LADOT District Office to investigate the speeding concern and to consider
speed humps and other traffic calming tools. See the "Contact Us"
Section for the District Office Information.
If the LADOT District Office finds that a comprehensive speed hump study is needed,
the requestor will receive detailed information on how to submit an Application for Study.
If the study concludes that speed humps are justified and feasible, then the requestor will receive detailed
information on how to submit a Speed Hump Petition. Generally, petitions are considered complete only when they are signed
by the owners or occupants represnting at least 75 percent of the residential units on the block(s)
where speed humps
are requested, including corner properties. LADOT will provide detailed information and
instructions to the block representative,
who will be responsible for sharing the information with the residents on the block(s).
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Speed humps are generally NOT installed at locations
where:
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- Vehicles’ critical speeds exceed the speed
limit by less than five miles per hour
- Traffic volume is less than 500 vehicles per day
- The roadway is a designated arterial street
- The roadway is on a designated public transit bus route
- The roadway lacks straight sections
- The roadway hassteep slopes
- Frequent driveway openings exist
- Speed limits are more than 30 miles per hour
- Less than 75 percent of the residences along the block(s)
support the proposal
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LADOT completes a comprehensive speed hump study within six
months. If approval is granted and funding is available,
speed hump(s) will be installed in approximately one year from the date of approval.
There are certain cases where speed humps have been approved,
but no City funding is available. Neighborhoods may opt to fund
the speed humps themselves.
LADOT also receives requests for speed hump removal. The same
procedure for speed hump installation petitions is used for removal petitions. The residents must pay for the cost of
removal if the valid removal petition is submitted less than five years after the date the speed humps
were installed.
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