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1 RiversideCA.gov
PAVEMENT MANAGEMENT PROGRAM
UPDATE
Mobility and Infrastructure Committee
September 8, 2022
Public Works Department
RiversideCA.gov
2 • A PMP assesses pavements and proposes treatments through a logical system in the most cost-effective manner .
• A PMP is an iterative process that grows in accuracy as more data is collected.
• On December 20, 2016, City Council approved an agreement with IMS to conduct a citywide pavement analysis.
– The average Network PCI score was 61 out of 100
– 13.2% of City streets are in “Excellent” condition (85 to 100) – 12.7% of City streets in “Very Poor” and “Poor” Condition (0 to 40) – $24M maintenance budget needed to maintain a PCI of 61
BACKGROUND
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3 • On October 6, 2020, City Council approved another agreement with IMS to complete an annual partial network analysis for 5 consecutive years:
– 1/3 of Arterial Streets analyzed annually
– 1/4 of Collector Streets analyzed annually
– 1/5 of Local Streets and Alleys analyzed annually
• Since the inception of the City Measure Z sales tax funding program, City Council has increased the PMP significantly.
• The PMP budget for FY 2022/23 is $24 million.
BACKGROUND
RiversideCA.gov
4 • Pavements typically
deteriorate rapidly after
40% of its life.
• It is more cost-effective
to provide a
preventative treatment
at 40% than at 55% life.
PAVEMENT DETERIORATION
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5 A preventative treatment
earlier will extend the
overall pavement life.
PAVEMENT PRESERVATION
RiversideCA.gov
6 PCI values provide an indication of the surface conditions and structural integrity of a pavement.
Condition Typical Distresses – Treatments PCI Range
Excellent Little to No Maintenance –S l u r r y Seal. 85‐100 Very Good Minor Cracking –S l u r r y Seal 70‐85
Good Minor to moderate cracking – Slurry/Patching/Overlay 60‐70 Fair Extensive Cracking – Patching/Repairs/Overlay 50‐60 Marginal Severe Cracking/Rutting – Repairs/Milling/Overlay 40‐50 Poor Major Severe Cracking/Rutting –T h i c k Milling/Overlay 25‐40 Very Poor Extensive Failures –R e c o n s t r u c t i o n 0‐25
TYPICAL DISTRESSES AND TREATMENTS
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7 • Key parameters that effect paveme nt design include truck traffic volume and the underlying soil condition.
• Designs that include foundation improvements increase the pavement life but is also more expensive.
• Pavements are engineered to carry truck traffic during their life. • The City Traffic Index Map is outdated meaning there is more traffic throughout the City.
• Cores collected periodically throughout the City have indicated many streets are under designed.
PAVEMENT DESIGN
RiversideCA.gov
8 • Slurry Seals: A mixture of water, asphalt emulsion, aggregate (very small, crushed rock), and additives.
• Dense Graded Asphalt Concrete: A mixture of aggregates with an asphalt cement binder which is a highly viscous liquid form of petroleum that acts as a glue.
• Asphalt Rubber Hot Mix: A hot-mixed asphalt pavement containing crumb rubber. The crumb rubber serves as a “modifier” of the liquid asphalt. Its addition gives the liquid asphalt greater viscosity (resistance to flow) and improves other properties which resist reflective cracking and rutting and prolong pavement life.
TYPICAL PAVEMENT TREATMENTS
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9 • Cold In-Place Recycling: A train of equipment with a milling machine, mixer and paver. A portion of the existing asphalt is milled, pulverized, mixed, rejuvenated, and placed back on the surface. • Full-Depth Reclamation: Involves the pulverization of the existing asphalt pavement section in-plac e and reutilized as a foundation base. A new asphalt surface is then applied on top of this base. • Fiber Reinforced Asphalt Concrete: A polymer fiber reinforcement is added to conventional asphalt to increase strength and durability including crack resistance, high temperature stability, and to resist premature cracking and rutting.
TYPICAL PAVEMENT TREATMENTS
RiversideCA.gov
10 Asphalt Rubber Aggregate Membrane: Consists of mixing 3/8-inch aggregate rock with a rubberized liquid material comprised of scrap tires and other additives. The memb rane resists reflective cracking and water intrusion. This is a cost-effective alternative for reconstruction and other conventional strategies. . The City is utilizing this product extensively as it benefits our budget deficiencies. 100% Recycled Hot Mix Asphalt: Manufactured with 100% recycled asphalt material generated from waste collected from construction projects. The product provides a benefit to the environment.
TYPICAL PAVEMENT TREATMENTS
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11 • City construction projects are available to all contractors with the proper license to complete the work.
• Construction contracts are awarded to the lowest responsive bidder as required per the City’s formal procurement procedures. • Construction contractors that manufacture their own asphalt near the City typically can construct projects more cost effectively. • The City potentially could adopt different procedures to award contracts based on a qualifications-based system and potentially adding some scoring benefit to local City contractors. However, the construction contract amounts will likely increase.
CONSTRUCTION CONTRACTORS AND AWARDS
RiversideCA.gov
12 • Focus on maintaining streets in the “Marginal” PCI range to prevent excessive growth in the City’s backlog of street in the “Poor” and “Very Poor” PCI range.
• Increase the preservation treatment on street in the “Good” PCI range to extend the pavement useful life.
• Extend the pavement moratorium from 3 to 5 years.
• Adopt a utility trench cut fee.
• Consider concrete approaches in heavily truck traveled locations.
POTENTIAL PMP STRATEGY MODIFICATIONS
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13 Strategic Priority 6 – Infrastructure, Mobility & Connectivity Goal 6.1 – Provide, expand and ensure equitable access to sustainable modes of transportation that connect people to opportunities such as employment, education, healthcare, and community amenities.
Goal 6.2 – Maintain, protect and improve assets and infrastructure within the City’s built environment to ensure enhance reliability, resiliency, sustainability, and facilitate connectivity Goal 6.4 – Incorporate Smart City strategies into the planning and development of local infrastructure projects.
Cross-Cutting Threads
STRATEGIC PLAN ALIGNMENT
RiversideCA.gov
14 That the Mobility and Infrastructure Committee
receive and file an update on the Pavement
Management Program.
RECOMMENDATION
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