Presentation on theme: "Department of Public Works Bureau of Street Services Valerie Lynne Shaw President Department of Public Works."— Presentation transcript:
Department of Public Works Bureau of Street Services Valerie Lynne Shaw President Department of Public Works
PROFESSOR POTHOLE PRESENTS Everything You Always Wanted To Know About Streets William A. Robertson Director Bureau of Street Services
THE STREET SYSTEM
Current Condition Assessment 6,500 mile street system Approximately 1,000 miles of failed streets Overall system condition is a C-
How Did We Get In This Mess? Prior to World War II the City was comprised of approximately 2,500 miles of paved streets and the Annual Resurfacing Program (ARP) consisted of 50 miles. After World War II, and the rapid growth of the San Fernando Valley the street system grew to 6,500 miles. Up until 1986, the ARP still consisted of only 50 miles of resurfacing. From 1987 to the early 1990’s, the ARP was increased to approximately 150 miles. Fiscal Year 1994-95, the Bureau was funded for its first 200 mile ARP. This year the ARP is funded at 116 miles.
HOW DO WE FIX THIS MESS?
10 Year Plan Maintenance –Slurry Seal –Crack Seal –Pothole Repairs Rehabilitation –Overlays –Resurfacing –Reconstruction $35 Million for Maintenance $115 Million for Rehabilitation
ANNUAL RESURFACING PROGRAM
Budget Allocation Formula Total Maintained Centerline Miles in CD Council District = x 100% AllocationTotal Maintained Centerline Miles Citywide
How Are Streets Selected? Street selection for the Annual Resurfacing Program is based on the Bureau’s Pavement Management System: –Defines the existing condition of streets. –Determines the most economical maintenance and rehabilitation strategy. –Predicts future condition of the street network based on different budget scenarios.
Why Don’t We Fix The Worst Streets First? 80/20 Allocation Plan 80% Overlays/Resurfacing 20% Reconstruction Spending more in reconstruction or using a “worst first” strategy would greatly reduce the number of streets resurfaced and cause an acceleration in the decline of the overall condition of the street system.
Pavements need to be managed, not simply maintained. Why Use Pavement Management?
PRESERVATION OF THE STREET SYSTEM
Rubberized Slurry Seal An emulsion mixture of oil, rubber, and fine sand. A preservative application (sealant) that: –Inhibits oxidation of the oils from the pavement. –Deters asphalt cracking. –Prevents water from seeping into the sub-base. –Extends the streets serviceable life, thereby reducing the need for repaving.
Slurry Seal Operations
Fresh, clean, and new appearance for neighborhoods.
25,935 Waste Tires are recycled for every 100 miles of streets slurry sealed. Environmental Benefits Reduction in dust and noise pollution. Eliminates noxious odors during on- site mixing of materials.
Innovations In Asphalt Technology Cold In-Place Recycling – The key to addressing failed streets in our neighborhoods. 25% to 35% more cost effective than conventional reconstruction. Less invasive to local neighborhoods.