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1 RiversideCA.gov
1 RiversideCA.gov
Infrastructure & Mobility Committee
August 10, 2023
Neighborhood Traffic Management
Program – Proposed Revisions
Public Works Department
RiversideCA.gov
2 BACKGROUND ISSUE
1. The City receives numerous requests
to install speed humps each year
(nearly 100 requests were received
during 2019 and over 120 requests in
2022).
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 estimated $18,000 per
street for 2 speed humps); and
– Potential Delays to Emergency Services.
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5 BACKGROUND2008 NTMP REVISIONS
The 2008 revisions to the NTMP included:
1. Eliminating the requirement for residents to fund a portion of the costs for 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 Department approvals prior to considering speed hump
projects to consulting the department on an as needed basis.
RiversideCA.gov
6 BACKGROUNDCONSIDERATION OF REINSTATEMENT
1. The City received nearly 100 requests for speed hump installations in 2019 and over 120 requests in 2022.
2. If only ¼ of requesting locations were to receive speed humps each year, minimum estimated costs for 30 projects in 2022 would be $540,000 to $1,080,000 annually (based on minimum 2 humps to 4 humps per location) for
installations alone not including maintenance;
3. If use of speed humps is reinstated, installations may shift traffic and speeding concerns to adjacent streets creating ongoing demand for speed humps.
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7 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 estimated at $9,000 per hump, with a minimum of 2 humps or $18,000 minimum per location plus maintenance costs (humps cannot withstand heavy vehicles)
5. Impacts to emergency vehicle response times.
RiversideCA.gov
8 BACKGROUNDPREVIOUS SPEED HUMP QUALIFYING CRITERIA
Prior criteria for the installation of speed humps include:
1. Roadway Characteristics: 25 MPH local streets with two travel lanes, and with a grade of less than 8%
2. Traffic Conditions: Minimum 24-hour traffic volumes of 500 vehicles less than 2,000 vehicles, with at least 30% of total traffic exceeding the speed limit by greater than 5 MPH
3. Petition Requirements: Minimum of 70% of all property owners or residents on the street where the humps are
being considered and 100% within 100 feet of the
proposed speed hump locations must sign the petition in support of installation
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9 BACKGROUNDHISTORIC SPEED HUMP INSTALLATION TOTALS
Historic installation totals show several peak years where high numbers of speed humps were installed under previous
qualifying criteria.
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18 45
56 38
23 61
28 30
12 TOTAL NUMBER OF HUMPS PER YEAR
SPEED HUMPS INSTALLED
1998 1999 2000 2001 2003 2002 2004 2005 2006 2007 2008
RiversideCA.gov
10 BACKGROUNDNTMP : LOCAL STREET INITIAL OPTIONS
NTMP initial traffic mitigation
measure options to address
speeding on local streets 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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11 BACKGROUNDNTMP : LOCAL STREET SECONDARY OPTIONS
Common secondary mitigation measure
options include:
1. Striping / Street Narrowing (centerline
striping, raised reflective pavement
markers, parking lane, edgeline);
2. Stop signs;
3. Curve warning or Chevron signs;
4. Speed feedback signs (primarily grant
funded); and/or
5. Turn or truck prohibition signs.
RiversideCA.gov
12 BACKGROUNDOTHER ALTERNATIVES: MAJOR IMPROVEMENTS
Other alternatives may be considered for local
streets where initial and secondary NTMP solutions
are unsuccessful, where deemed appropriate,
and if funding has been identified including:
1. Flashing LED edge lit Stop signs (primarily
grant funded); and/or
2. Flashing LED lit Curve warning or Chevron
signs (primarily grant funded);
3. Speed limit pavement legend; and/or
4. Neighborhood traffic circles (grant funded).
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13 BACKGROUND
PROPOSED REINSTATEMENT OF SPEED HUMP USE
WITH MODIFICATIONS TO QUALIFYING CRITERIA
In response to ongoing resident
requests for speed humps, increased
cut-through traffic due to elevated use
of navigation tools, changes in driver
behavior, and device effectiveness
Public Works is proposing reinstatement
of speed hump use as a potential
secondary mitigation measure with
modifications to qualifying criteria.
RiversideCA.gov
14 BACKGROUNDNEED FOR MODIFICATIONS TO QUALIFYING CRITERIA
1. To restore speed hump use and manage related costs
modifications to the “Traffic Conditions” component of the qualifying criteria are necessary.
2. Budget constraints and increases in materials and installation costs over the years do not support sustaining historic levels of speed hump installations.
3. Modifying speed hump qualifying criteria to focus utilization of speed humps on the streets with high traffic volumes and significant speeding allows for restoration of speed hump while maintaining annual project costs at a viable level.
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15 BACKGROUNDPROPOSED SPEED HUMP QUALIFYING CRITERIA
Proposed modified speed hump qualifying criteria includes:
1. Roadway Characteristics: 25 MPH local streets with two travel lanes and a grade of less than 8% (unchanged)
2. Traffic Conditions: 24-hour traffic volumes of at least 750 vehicles and less than 2,000 vehicles with a combined 85th% speed of 37 MPH or greater
3. Petition: Signed showing support by a minimum of 70% of property owners or residents on the street where humps are being considered and 100% of residents within 100 feet of proposed speed hump locations (unchanged)
RiversideCA.gov
16 BACKGROUNDSPEED HUMP INSTALLATION OPTIONS
Options for speed hump installation include:
1. Installation by City Streets Div ision staff with estimated costs at $9,000 per speed humps; and/or
2. Scheduling installation as part of upcoming or future Capital Improvement Project (CIP) as part of future repaving projects which may:
a. Defer speed hump installation costs until roadway paving is scheduled; b. Result in minor cost savings as the result of larger scale CIP projects; c. Create delays with changes in residents at time of installation versus when the qualifying speed hump petition is signed.
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17 BACKGROUND
PROPOSED TEMPORARY ART CROSSWALKS & PAVEMENT MURAL
PILOT PROGRAM AS NTMP SECONDARY MITIGATION MEASURE
Public Works is also proposing the
addition of a temporary art crosswalk
and pavement mural pilot project as
an NTMP secondary mitigation
measure option:
1. For use on local roadways; and
2. Locations would be subject to
selection criteria.
RiversideCA.gov
18 Addition of an Art Crosswalk and Pavement Mural Pilot Project to the NTMP would:
Expand the City’s vision of enhancing resident and visitor art and cultural experiences;
Inspire community input, involvement, and engagement; Increase visibility of pedestrian and bicyclist public spaces; Elevate motorist awareness which may improve safety;
Promote alternate modes of transportation by enhancing walking/cycling environments and user comfort levels; and Advocate collaboration, beautification, and the safe
sharing of roadways.
PRIMARY BENEFITS OF ART CROSSWALKS & PAVEMENT MURALS
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19 Proposed pilot projects will focus on locations which have the following key features:
Existing marked pedestrian crosswalks and ADA ramps;
Existing street lighting at or in close proximity to the marked crossings;
High levels of pedestrian and bicyclist crossing activity; Are on routes to schools, libraries, or other key cultural or Downtown locations; and/or
Include evaluation of collision history
PROPOSED ART CROSSWALKS & PAVEMENT MURALS PILOT PROGRAM –
SELECTION CRITERIA
RiversideCA.gov
20 Public Works reached out to several agencies who have implemented either Art Crosswalk and/or Pavement Mural projects in the recent past (some as part of either a SCAG Go Human Grant or a Bloomberg Philanthropies Asphalt Art Initiative Grant) to obtain relevant project information. Sou thern California cities which have participated in these types of projects include:
• The City of Rancho Cucamonga;
• The City of Pasadena;
• The City of Azusa;
• The City of Imperial, and
• The City of Long Beach.
LOCAL AGENCY PRIOR ART CROSSWALK & PAVEMENT MURAL
PROJECT INFORMATION
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21 The City of Rancho Cucamonga shared the following information regarding their project experiences:
The initial project was funded via a 2018 SCAG GoHuman Mini-Grant that installed a temporary pavement mural within the intersection of Baker Ave. & E. 9th St.; The selected intersection serves as a crossing point for Los Amigos Elementary School students and the project was the culmination of collaborative efforts by the city, school, area residents, community partners, and a local graphic artist; The chosen design was chalked out by the artist and students, residents, and community members were invited to participate in the actual painting of the mural which promoted a strong sense of community involvement and pride; and A2
nd 2021 SCAG Grant awarded to a non-profit partner, Music Changing Lives, included repainting of the pavement mural and adding art to the sidewalks as well as roadway striping aimed at lowering traffic speeds along 9 th Street between
Grove and Vineyard.
SO-CAL LOCAL AGENCY PRIOR ART CROSSWALK
& PAVEMENT MURAL PROJECT INFORMATION
RiversideCA.gov
22 CITY OF RANCHO CUCAMONGA
BAKER AVE. AT EAST 9TH ST.
CITY OF LONG BEACH
JUNIPERO AVE. & BROADWAY
PAVEMENT MURAL & ART CROSSWALK DESIGN SAMPLES
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23 Public Works has identified a grant opportunity through Bloomberg Philanthropies Asphalt Art Initiative which focuses on art crosswalk and/or pavement mural projects.
Grant specifics include:
Maximum grant amount of $25,000;
Funding may be requested for project data collection; No local funding match required;
Project is considered temporary du e to longevity of art materials, however, cost for maintenance and/or removal may be
incorporated into funding request; and
If awarded project construction to occur in 2024.
BLOOMBERG PHILANTHROPIES
ASPHALT ART INITIATIVE GRANT OPPORTUNITY
RiversideCA.gov
24 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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25 BACKGROUNDRECOMMENDATIONS
That the Mobility & Infrastructure Committee review and provide recommendation to the City Council regarding proposed revisions to the Neighborhood Traffic Management Program (NTMP) including:
1. Reinstatement of the use of speed humps as a local street secondary mitigation measure option under th e Neighborhood Traffic Management Program with modifications to the “Traffic Conditions” qualifying criteria; and
2. Establishment of a new Temporary Art Crosswalk and Pavement Mural Pilot Program as a local street secondary mitigation measure option under the Neighborhood Traffic Management Program.
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