Pavement Preservation Journal - Fall 2016 - 31

Cold central plant recycling of asphalt mixes help L.A. County meet environmental sustainability goals age. A further complexity is the county roads are located within 137 noncontiguous islands within the 400 square miles of Los Angeles County. To effectively manage the road network, pavement conditions for all roads within the network must be current. Due to the vast area of the county we utilize in-house staffing with outsourcing to evaluate our pavement. Both data collection efforts carefully identify the type, severity, and extent of road distresses. This information is then entered into our PMS, which converts the data into a pavement condition index on a scale ranging from 0 to 100, with 100 being best. Our PMS is Stantec's RoadMatrix V3.3. It's is a good fit for DPW because of its capability of handling the complexity of our network, with the ability to process large amounts of pavement data quickly. Once the PCI is determined, the next questions are "What roads do we treat first and when should we fix them?" In the development of our sustainable pavement approach answering these questions by using information from our pavement management system became essential. RoadMatrix has robust planning tools including a GIS component, decision tree modeling, and pavement condition forecasting capabilities to make that task easier. The GIS component is very effective in grouping neighboring roads with similar classifications and similar conditions providing a "big picture" viewpoint. Decision trees helped outline a path for us to follow in the implementation of our pavement preservation program, as well as for implementing sustainable treatments for our rehabilitation and reconstruction projects. To provide pavement condition forecasting, RoadMatrix developed performance curves based upon the thickness of the pavement, traffic volume and subgrade strength for each county road. Using these performance curves, the PCI thresholds for each treatment strategies (pavement preservation, thin overlays, rehabilitation and reconstruction) - and the current PCI on a given road - we are able to estimate how long before the current pavement condition falls to the next treatment level. This capability enables us to catch roads before they reach a condition level that would require a more costly treatment. As of December 2015, the county's PCI for major and local roads combined is 69. The county's goal is to get the roads into a state of good repair (PCI of 82) so the treatments to maintain the road network from that point forward would be predominantly the less costly pavement preservation treatments. sustAinAbLe roAd imProvements In 2009 DPW, in collaboration with technical experts and representatives from the pavement industry, piloted several sustainable projects on county roads to evaluate their performance and cost. The successes of the treatments and associated cost savings led to the development of the following sustainable program, which was initiated in 2010: * First take care of the roads that are in good condition. This "pavement preservation" approach contradicted our previous "worst first" approach practice, and seemed counter intuitive to some. A common question we were asked was, "Why would you use limited funding and resources to maintain good roads when the bad roads are the ones that need the repair the most?" Although many people understand the long-term benefits and cost savings of performing preventive maintenance activities on homes and automobiles, they do not necessarily translate these principles to maintaining a road network. Fall 2016 pavement preservation journal 31

Table of Contents for the Digital Edition of Pavement Preservation Journal - Fall 2016

President’s Message
Still Time to Visit NPPC 2016
NCAT: Quantifying Southern Treatments, Placing Northern Treatments
LTPP Tackles Pavement Preservation
D.C. Update: Capitol Hill Etiquette for Visits
FP2 @ Eurasphalt & Eurobitume 2016
Los Angeles County Abandons 'Worst First' Pavement Program
High-Volume U.S. 3 Gets R26 Showcase Preservation
New Mechanistic Tool Assesses Joint Sealant Effectiveness
Index of Advertisers
Pavement Preservation Journal - Fall 2016 - Cover1
Pavement Preservation Journal - Fall 2016 - IBD_L
Pavement Preservation Journal - Fall 2016 - IBD
Pavement Preservation Journal - Fall 2016 - cover2
Pavement Preservation Journal - Fall 2016 - 3
Pavement Preservation Journal - Fall 2016 - 4
Pavement Preservation Journal - Fall 2016 - 5
Pavement Preservation Journal - Fall 2016 - 6
Pavement Preservation Journal - Fall 2016 - 7
Pavement Preservation Journal - Fall 2016 - 8
Pavement Preservation Journal - Fall 2016 - President’s Message
Pavement Preservation Journal - Fall 2016 - 10
Pavement Preservation Journal - Fall 2016 - Still Time to Visit NPPC 2016
Pavement Preservation Journal - Fall 2016 - 12
Pavement Preservation Journal - Fall 2016 - 13
Pavement Preservation Journal - Fall 2016 - 14
Pavement Preservation Journal - Fall 2016 - 15
Pavement Preservation Journal - Fall 2016 - 16
Pavement Preservation Journal - Fall 2016 - NCAT: Quantifying Southern Treatments, Placing Northern Treatments
Pavement Preservation Journal - Fall 2016 - 18
Pavement Preservation Journal - Fall 2016 - 19
Pavement Preservation Journal - Fall 2016 - LTPP Tackles Pavement Preservation
Pavement Preservation Journal - Fall 2016 - 21
Pavement Preservation Journal - Fall 2016 - 22
Pavement Preservation Journal - Fall 2016 - 23
Pavement Preservation Journal - Fall 2016 - 24
Pavement Preservation Journal - Fall 2016 - D.C. Update: Capitol Hill Etiquette for Visits
Pavement Preservation Journal - Fall 2016 - 26
Pavement Preservation Journal - Fall 2016 - FP2 @ Eurasphalt & Eurobitume 2016
Pavement Preservation Journal - Fall 2016 - 28
Pavement Preservation Journal - Fall 2016 - Los Angeles County Abandons 'Worst First' Pavement Program
Pavement Preservation Journal - Fall 2016 - 30
Pavement Preservation Journal - Fall 2016 - 31
Pavement Preservation Journal - Fall 2016 - 32
Pavement Preservation Journal - Fall 2016 - 33
Pavement Preservation Journal - Fall 2016 - High-Volume U.S. 3 Gets R26 Showcase Preservation
Pavement Preservation Journal - Fall 2016 - 35
Pavement Preservation Journal - Fall 2016 - 36
Pavement Preservation Journal - Fall 2016 - 37
Pavement Preservation Journal - Fall 2016 - 38
Pavement Preservation Journal - Fall 2016 - New Mechanistic Tool Assesses Joint Sealant Effectiveness
Pavement Preservation Journal - Fall 2016 - 40
Pavement Preservation Journal - Fall 2016 - 41
Pavement Preservation Journal - Fall 2016 - Index of Advertisers
Pavement Preservation Journal - Fall 2016 - cover3
Pavement Preservation Journal - Fall 2016 - cover4
Pavement Preservation Journal - Fall 2016 - outsert1
Pavement Preservation Journal - Fall 2016 - outsert2
Pavement Preservation Journal - Fall 2016 - outsert3
Pavement Preservation Journal - Fall 2016 - outsert4
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