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1 RiversideCA.gov
1 RiversideCA.gov
City Council
December 13, 2022
Neighborhood Traffic Management
Program – Proposed Revisions
Public Works Department
RiversideCA.gov
2 BACKGROUNDBACKGROUND
1. The City received nearly 100
requests to install speed humps
during 2019.
2. The Public Works Department was
requested to re-examine its
practice of not installing speed
humps.
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3 BACKGROUNDBACKGROUND
1. The Neighborhood Traffic Management
Program(NTMP) includes a wide array of
traffic calming tools for a variety of road
types.
2. The last major revision to the NTMP
occurred in 2008.
3. Speed humps are low-profile (often 3.5”
in height) and gradual rises in the
roadway profile intended to slow traffic
by creating discomfort at higher
speeds.
RiversideCA.gov
4 BACKGROUNDBACKGROUND CONTINUED
1. In 2011, the last new speed hump project
was implemented.
2. In 2014, the Public Works Director
discontinued the use of speed humps
within the City at their discretion, based
on engineering judgement of the tool.
– Diversion of Traffic & Driver Behavior
– Noise
– Cost (Minimum $8,000 per street)
– Emergency Services
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5 BACKGROUNDCONSIDERATION OF REINSTATEMENT
1. The City received nearly 100 requests for speed hump installations in 2019.
2. If speed humps were to be installed at these locations, it is likely that concerns would spread to adjacent streets – meaning the rate of requests would not slow.
3. If only 25 locations were to receive speed humps per year, minimum costs of $200,000 annually would be incurred
with potential costs reachi ng $400,000 (based on 2 to 4 humps per location) for installations alone not including maintenance.
RiversideCA.gov
6 BACKGROUNDNTMP ALTERNATIVES: INITIAL SOLUTIONS
NTMP identified initial solutions for
l o c a ls t r e e t sa sa l t e r n a t i v e st o
speed humps include:
1. Deployment of the radar speed
feedback trailer;
2. Changeable message board
display;
3. RPD enforcement; and/or
4. Speed limit sign installation.
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7 BACKGROUNDNTMP ALTERNATIVES: SECONDARY SOLUTIONS
1. Centerline striping / raised reflective
pavement markers;
2. Street narrowing by striping (parking
lane, edgeline);
3. Stop signs;
4. Curve warning signs;
5. Speed feedback signs (primarily
grant funded); and/or
6. Turn prohibition signs.
RiversideCA.gov
8 BACKGROUNDNTMP ALTERNATIVES: MAJOR IMPROVEMENTS
The below measures may be utilized when
initial and secondary solutions are
unsuccessful, an alternative measure is
deemed appropriate, and funding is
identified.
1. Speed limit pavement markings;
2. Neighborhood traffic circles (grant funded);
3. Flashing LED edge lit Stop signs (primarily
grant funded); and
4. Flashing LED lit Curve warning signs
(primarily grant funded).
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9 BACKGROUNDPLANNED PILOT PROGRAMS
1. Rubber speed humps to be
installed on a temporary & rotating
basis
2. Pavement murals & art crosswalks
RiversideCA.gov
10 Strategic Priority 2 – Community Well-Being
Goal 2.4 – Support programs and innovations that enhance community safety, encourage neighborhood engagement, and build public trust
Cross-Cutting Threads
STRATEGIC PLAN ALIGNMENT
STRATEGIC PLAN ALIGNMENT
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11 BACKGROUNDRECOMMENDATION
That the City Council approve the proposed revisions to the Neighborhood Traffic Management Program
regarding the installation of speed humps.
RiversideCA.gov
12 BACKGROUNDADDITIONAL INFORMATION
ADDITIONAL INFORMATION
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13 BACKGROUNDPREVIOUS SPEED HUMP CRITERIA
Criteria within the NTMP for the installation of speed humps include:
1. 25 MPH local streets with two travel lanes, 24-Hour traffic volumes of less than 2,000 vehicles, and with a grade of less than 8%;
2. Minimum 24-hour traffic volumes of 500 vehicles with at least 30% of total traffic exceeding the speed limit by greater than 5 MPH; and
3. Minimum of 70% of all property owners or residents on the street where the humps are being considered and 100% of residents within 100 feet of the proposed speed hump locations must sign the petition in support of installation.
RiversideCA.gov
14 BACKGROUND2008 NTMP REVISIONS
The 2008 revisions to the NTMP included:
1. Eliminating the requirement for residents to fund the costs with the implementation of speed humps;
2. Solutions defined as “Secondary Solutions” to be considered at the discretion of the Public Works Department and that traffic volumes, speed data, and/or field observations would be the basis for identification of solutions; and
3. Changing the speed hump process which had required Fire and Police Department approvals prior to considering speed hump projects to consulting these departments on an as needed basis. 13 14
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15 BACKGROUNDDISADVANTAGES OF SPEED HUMPS
The following are disadvantages of speed humps:
1. Diversion of traffic – installation of speed humps often results in speeding traffic diverting to adjacent local roadways;
2. Noise – speed humps generate additional noise as a result of vehicles braking and traversing the humps;
3. Motorist tendency to speed in between speed humps;
4. Expense – installation at $4,000 per hump, with a minimum of 2 humps or $8,000 per location plus maintenance costs (humps cannot withstand heavy vehicles); and
5. Impacts to emergency vehicle response times.
RiversideCA.gov
16 BACKGROUNDOTHER LOCAL AGENCY PRACTICES
1. Corona & County of Riverside prohibits the use of
speed humps
2. Anaheim has a phased approached to its NTMP and
speed humps are identified as the last alternative.
3. Moreno Valley and Murrieta, despite citing
disadvantages, have a program to allow for speed
hump installation.
4. These cities cite the same concerns with speed hump
installation as Riverside.
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