HomeMy WebLinkAboutItem 02 Hansen Pavement Management Status Report
Meeting Date:
Meeting Type:
Department:
Staff Contact:
Staff Phone No:
Estimated Time:
January 28, 2008
Work Session
Public Works Qu4
Brian Conlon ~
726-3617
20 minutes.
AGENDA ITEM SUMMARY
SPRINGFIELD
CITY COUNCIL
ITEM TITLE:
HANSEN PAVEMENT MANAGEMENT STATUS REPORT
ACTION
REQUESTED:
None. This item is for information only
ISSUE
STATEMENT:
The Maintenance Division of the Public Works Department is responsible for
maintenance, operation, repair and preservation of the City's infrastructure. In
FY06-07 Public Works Maintenance Division purchased and began implementing
the Hansen Pavement Management System (PMS) Software to improve our ability
to effectively manage the City's street infrastructure. A summary of how the PMS
is being utilized and evolving is presented for City Council information.
ATTACHMENTS:
Attachment A: Council Briefing Memorandum
DISCUSSION/ ,
FINANCIAL
IMP ACT:
One of the Public Works Department's fundamental transportation objectives is to
maintain and improve the street system through strategic pavement preservation.
The Hansen PMS is an asset management tool to provide guidance in planning and
developing our preventive maintenance and capital repair strategies. Another
important benefit of the PMS is increased ability to more accurately forecast current
and future funding needs. ThIS becomes critically important when representing the
cost to effectively manage the street system, moreover with meeting the challenge
to acquire adequate funding sources to meet the future preventiye maintenance and
repair demands.
We are faced with major challenges funding pavement preservation and
rehabilitation projects and avoiding growing the backlog of streets in need of major
reconstruction. Optimizing the use of those funds dedicated to street preservation
becomes evermore important. The Hansen PMS will playa crucial role in
developing effective and credible preservation and rehabilitation strategies required
to properly maintain the street system network.
MEMORANDUM
City of Springfield
To:
From:
Gino Grimaldi; City Manager
Dan Brown, Public Works Director Q ~
Brian Conlon, Maintenance Manager ~
COUNCIL
BRIEFING
MEMORANDUM
Date:
Subject:
January 28, 2008
STATUS REPORT ON PUBLIC WORKS UTILIZATION OF HANSEN
PAVEMENT MANAGEMENT SYSTEM
ISSUE
In FY06-07 Public Works Maintenance Division purchased and began implementing the Hansen
- Pavement Management System (PMS) Software to improve our ability to effectively manage the
City's street infrastructure. The Hansen PMS is an asset management tool to provide guidance in
planning and developing our preventive maintenance and capital repair strategies. Another
important benefit of the PMS is increased ability to more accurately forecast current and future
~ding needs. This becomes critically important when representing the cost to effectively
manage the street system, moreover with meeting the challenge to acquire adequate funding
sources to meet the future preventive maintenance and repair demands. A summary of how the
PMS is being utilized and evolving is presented for City"Council informatiqn. '
BACKGROUND
The Public Works Department is responsible for operation, maintenance, preservation and repair
of the City's infrastructure. The City's transportation system is fast approaching 200 miles of
streets within our maintenance jurisdiction., F or the approximate 165 miles of improved streets,
upon City Council acceptance, the City is committed to perpetually maintaining them. One of the
Public Works Department's fundamental transportation objectives is to maintain and improve the
street system through strategic pavement preservation. For an effective preservation program, a
coordinated effort is required by the Maintenance and Engineering Divisions. The PMS
incorporates science into the decision management process. We are faced with major challenges
funding pavement preservation and rehabilitation projects and avoiding growing the backlog of
streets in need of major reconstruction. It is much easier to identify a long list of needed
preventive maintenance and rehabilitation projects than it is to indentify adequate funding
sources for the projects. The Hansen PMS will playa crucial role as we compete to acquire
Fedenil and State assistance opportunities amongst other jurisdictions. On the Federal side it is
often prerequisite that submitting agencies certify their data through accredited pavement
management methods. Hansen PMS meets this criteria.
DISCUSSION
The primary purpose for maintaining a PMS is to inventory street condition data, analyze the
information using engineering principles and methodologies for predicting street decline trends, ,
Attachment A
Page 1 of 4
thereby allowing for optimum thning in planning for cost effective maintenance or rehabilitation.
Since the City Council established the local gas tax in FY2004 to fund pavement preservation,
PW Maintenance has been utilizing Hansen as a tool to prioritize and indentify project segments
in need of preventive maintenance treatments such as crack and slurry sealing and asphalt
concrete (AC) overlays. In addition to improved capability with prioritization and project
selection, the Hansen PMS enhancement in FY06-07 provides for system forecasting such as
valuation of extended useful life achieved from the preventive treatment, engineering theory for
estimating trends in rate of street deterioration, ability to generate reports through a multitude of
system analysis such as street type, functional class, defect, etc., apply unit costs for treatments
and prospective projects, as well as comprehensive evaluation and modeling of the street system
to indentify current and future funding demand.
The following are some commonly asked questions about the Hansen Pavement Management
System:
How Does the PMS Work?
The major component of the PMS is the Street Segment Inventory. Each street is evaluated block
by block. For example, 5th Street - from A Street to B Street is one link in the network. Data is
collected on physical attributes such as street segment length, width, surface type, classification,
sidewalks, curbs/gutters, bike lanes, etc. Some traffic related data collected is speed limit, # of
lanes, designed average daily trips (ADT), etc.
How is the condition of a street evaluated?
Street data is collected by Maintenance staff by doing field inspections of the street network.
Comprehensive condition inspections are performed every two years. Streets are evaluated by
block segments for three (3) observable surface defects: Raveling (sometimes referred to as
weather worn); Cracking (linear and vertical separation of the ac mat); and Base Failure
(severely distressed pavement). These defects are rated within two (2) categories: Severity [1-3]
(degree based); and Amount [1-5] (% based).
The defect values combined derive a total segment score.
Scoring sample: 1,1 = excellent or very near perfect condition.
3,5 = complete failure in surface street condition.
What determines if a street is due preservation and/or rehabilitation?
It is of course optimal to perform timely preventive maintenance to extend the pavement life as
opposed to allowing decline to the point of reconstruction. The PMS possesses engineering
principles and values for pavement life expectancy. These values in conjunction with the total
segment score are the core of forecasting and planning the preventive treatment. Keep in mind
that the computer generated data is an extension of staff observations and technology and that
there are other factors that weigh into the decision equation. Some of these factors are, project
prioritization by street classification (Arterials/Collectors weighted higher than Locals), traffic
loads, development driven transportation needs, common maintenance and repair interests with
other local agencies, safety, etc.
Attachment A
Page 2 of 4
What is the correlation between the PMS and Street fund appropriation?
The Hansen PMS, if effectively used, is a very useful tool to help PW manage a complex set of
infrastructure. The PMS can provide an array of costing and funding analysis with a high degree
of accuracy. We are therefore able to provide our citizens with a quantifiable measure of the
current health of Springfield's transportation network.
What is meant by the term backlog?
Backlog is a list of streets that the overall condition, due to severe pavement distress, either
requires partial or total reconstruction of the segment. In-other-words, preventive maintenance is
overdue and un-programmed, and/or major rehabilitation of the street is needed. The condition
has declined to the point where preventive treatments are ineffective.
Provided below are some sample reports produced from the Hansen PMS data:
Street By Type and Zone
25
Miles of Street
o Minor Arterial
. Local
. Collector
Zone Zone Zone Zone Zone Zone Zone Zone Zone Zone Zone Zone Zone
1 2, 3 4 5 6 7 8 9 10 11 12 13
Bar graph showing approximate street mileage breakdown
by classification in the City's 13 zones (includes Glenwood)
City Totals
'I11lrovedl Unil11lroved
. Collector 15%
Pie chart of street network by class and percentage Pie chart of street network by type and percentage
(ImprovedlUnimproved)
Attachment A
Page 3 of 4
Funding Projections For Zone 1
$140,000,00
$120,000.00
$80,000,00
$100,000,00
$60,000,00
$40,000,00
$20,000,00
$-
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
Year
Line graph representing 10-year projected funding needs for Zone 1 preventive treatments
NEXT STEPS
Although we are really just scratching the surface with respect to fully utilizing the new Hansen
PMS software, Public Works remains dedicated to our responsibility to look for the most cost
effective ways to effectively manage the City's transportation system. The Hansen Pavement
Management System is an innovative and practical tool to aid with this endeavor.
COUNCIL ACTION REQUESTED
None. This item is for the Council's information and discussion.
Attachment A
Page 4 of 4