Transcript Minnesota DOT - Pavement Markings

2005 Pavement
Marking Activities
and Performance
5/12/2006
District Engineer Presentation
1
Making Road Stripes/Markings Clearly Visible
Customer Satisfaction Rating (1-10 Scale)
Mean Rating
Acceptable = 8.0
7.7
7.5
7.4
7.3
7.2
7.2
7.4
7.3
7.0
7.0
Actual = 7.3
= Omnibus Survey
Neutral
= Maintenance Survey
6.0
1994
Positive
8.0
1996
2000
2001
2002
2003
2004
Mar
2005
Dec
2005
Year
5/12/2006
District Engineer Presentation
2
Pavement Markings Outline
• Pavement Marking Tech Memo Compliance
– Substantial Compliance by 2007
• Pavement Marking Performance
– Retroreflective data issues – national and Mn/DOT
• Central Business Activities
– Material Costs increased and are predicted to
increase again in 2006 (petroleum based)
– Central Business still generating big savings
• Wider lines
– No quantitative data to show wider lines equal
decreased crash rates
5/12/2006
District Engineer Presentation
3
Pavement Markings
Policy, Measures, Targets
• Policy
– Provide appropriate pavement marking on all
highways 365 days a year.
• Measures
– Percent appropriate marking materials
– Customer Satisfaction
– Cost Accounting
• Targets
– 100 Percent appropriate materials by Dec 2007
5/12/2006
District Engineer Presentation
4
Pavement Marking Tech Memo
• Technical Memorandum 03-08-T-03 “Mn/DOT Policy for
Pavement Marking Operations”
• Issued May 2, 2003 for compliance by December 31,
2007
• With New Construction and Retrofit should have
substantial compliance by 2007
5/12/2006
District Engineer Presentation
5
Tech Memo Flow Chart
Two Lane
Two Way
Non IRC
Less than 2 yrs
Life
Remaining
IRC or
Multi-Lane
Divided and
Undivided
Less than
2 years
Latex
2 or more yrs
Life
Remaining
Epoxy
Latex
AADT > 1500
AADT < 1500
AADT
Latex
5/12/2006
2 to 6
years
left
More than 6
years left
Epoxy
District Engineer Presentation
Epoxy Edge
Tape Lane Line
Tape Center Line
6
Non-Compliant Roadways by centerline miles
Need 400 miles to Epoxy and 532 Miles to Tape/Epoxy
8% of 11,909 miles Statewide
Epoxy miles
Non-Compliant
Tape / Epoxy miles
District Engineer Presentation
Metro
8
7
6
4
District
Compliant
Non-Compliant
5/12/2006
3
2
100
50
0
1
250
200
150
7
Tech Memo Retrofit
Remaining Cost Estimate = 2.18 million
Broken Down by District
Epoxy miles
Tape / Epoxy miles
$1,000,000
$750,000
$500,000
5/12/2006
District Engineer Presentation
8
Metro
District
7
6
4
3
2
$0
1
$250,000
8
Pavement Marking
Retroreflectivity
• The ability of the pavement markings to reflective
light back to its source.
– Headlights bounce off of tiny glass beads directly
back to the driver instead of scattering.
• Wear (vehicles, weather) and Tear (snow plows)
reduces Pavement Marking Retroreflectivity
5/12/2006
District Engineer Presentation
9
Retroreflectivity
• Field test of three products for wet night retroreflectivity
• Mobile retroreflectivity data issues undermine district
confidence in the data
• Need an annual planned route to systematically sample
the health of the Pavement Marking System
• 6 out of 8 Districts have Handheld Retroreflectometers
– District 2 upgraded to new model
• Preventative Maintenance Activities causing
measurement and durability issues
5/12/2006
District Engineer Presentation
10
Wet Reflective Field Test
TH 610 Brooklyn Park Metro District
Presented at ATSSA 2006 How To Conference
Presentation Posted on the Web
5/12/2006
District Engineer Presentation
11
Wet Reflective
Field Test
Wet night observation
–380 WR ES
three times as bright
–Glomarc 90
1.5 times as bright
–Pathfinder
least bright but brighter
than standard epoxy
5/12/2006
District Engineer Presentation
12
Retroreflective Data Plan
• Greatly increase use of handheld readings on new
projects and 2L2W roads
• National data bias issue for mobile retro
– Software algorithm flaw
– Make post collection adjustments to data
– Work with Pennsylvania State University
• MnDOT data issues
– Rebuild District confidence in data
– Prove effectiveness of equipment and procedures
– Created more meaningful reporting format
5/12/2006
District Engineer Presentation
13
Pavement Marking Activities
• Participated in Inspector’s Workshops statewide
• Field testing three Wet Reflective markings
• Improved Mobile Retroreflectivity System
– Retrained the data collection crew
– Testing system for validity and cost effectiveness
• Working with Pennsylvania State University
• Repeatability testing at MnROAD
– Instituting new procedures for collection and reporting
• Completion of Sampling Plan
– 20% complete
• Completion of 2006 Specifications
– 20% complete
5/12/2006
District Engineer Presentation
14
Central Striping Business
Line Maintenance
• 2005 costs rose 7% due to increased material costs
• Labor costs stayed about the same in 2005
5/12/2006
District Engineer Presentation
15
Central Striping Business
Line Maintenance
• Material cost reduction
– started in 2003
– Reduced line thickness for liquid markings from 15
to 12 mils
– Reduced glass beads in epoxy from 30 lbs/gal to
15 lbs/gal
• Latex is performing the same
• Epoxy (need long term data)
– Possible durability issue
5/12/2006
District Engineer Presentation
16
Central Striping Business
Line Maintenance Volume (Miles)
Epoxy
Latex
Total Miles
25000
20000
15000
10000
5000
0
2000
5/12/2006
2001
2002
2003
District Engineer Presentation
2004
2005
2006
17
Central Striping Business
Line Maintenance Expenditures
$8,000,000
$7,000,000
$6,000,000
$5,000,000
$4,000,000
Labor and Equipment
$3,000,000
$2,000,000
Materials
$1,000,000
$0
2001
5/12/2006
2002
2003
District Engineer Presentation
2004
2005
18
Central Striping Business
Line Maintenance Unit Cost
$0.25
Latex Cost Per Foot
Epoxy Cost Per Foot
$0.20
$0.15
$0.10
$0.05
$0.00
2000
5/12/2006
2001
2002
2003
District Engineer Presentation
2004
2005
2006
19
Wider Lines
• Six inch wide lines
– Literature review: no scientific evidence to
support increase safety with increase width
of lines
– Many states have adopted wider lines for
safety because of positive customer
response
– Wider lines are intuitively easier to see
5/12/2006
District Engineer Presentation
20
Summary
• 92% Compliance for Appropriate Marking Materials,
predicted 100% compliance by 2007
• Creating better performance evaluation of marking
materials
• Central Business efficiency has reduced costs; rising
petroleum prices have increased material costs
• Survey results: customers are positive but not
completely satisfied
5/12/2006
District Engineer Presentation
21