Pavement Preservation Update - TSP2

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Gayle Maurer, P.E.. Anita Bush, P.E. ... NDOT initiated the PMS in 1980 .... 171 - 200. 400. > 115. 500. > 160. 500. > 200. 500. Friction Number. PMS Points.
Pavement Preservation Update Rocky Mountain Pavement Preservation Partnership Annual Meeting Gayle Maurer, P.E. Anita Bush, P.E. Nevada Department of Transportation (NDOT)

Nevada Department of Transportation “Smooth Roads Ahead”

Outline  Nevada’s

state-maintained roadway network

 PMS

information

 Recent

accomplishments

 Current

endeavors

Nevada Department of Transportation “Smooth Roads Ahead”

Nevada’s State-maintained Roadway Network NDOT Maintains 5,376 Centerline Miles of Roads

Nevada’s State-maintained Roadway Network 

Roadway network includes 94% asphalt concrete and 6% PCCP pavements



Network estimated to be worth $20 billion



State-maintained roadway network consists of only 16% of the roads in Nevada, however, is overwhelmingly important to the traveling public



56% of total vehicle miles of travel, 83% of all truck travel, and 86% of all heavy truck traffic are carried on the state-maintained roadway network

Nevada Department of Transportation “Smooth Roads Ahead”

Outline  Nevada’s

state-maintained roadway network

 PMS

information

 Recent

accomplishments

 Current

endeavors

Nevada Department of Transportation “Smooth Roads Ahead”

PMS Background 

NDOT initiated the PMS in 1980



Quick progress due to in-house abilities



Improved and advanced for 30 years Improved numerous aspects of the data collection and condition characterization procedures  Advanced with experience and as technology improved 

Nevada Department of Transportation “Smooth Roads Ahead”

PMS Information 

Network and project level activities



All necessary inventory data and database management



Use the family model method and long-term data for prediction modeling, along with LCCA



Use of mill and thin HMA overlays on various schedules for different road categories is preferred over major rehabilitation or reconstruction

Nevada Department of Transportation “Smooth Roads Ahead”

Divide Roadway Network Into Five Categories ROAD PRIORITIZATION CATEGORY

1

TWO DIRECTIONAL ADT AND ESALS Controlled Access

TOTAL LANE MILES

PERCENT OF ROAD NETWORK

REQUIRED FREQUENCY OF REHABILIATION IN YEARS

ANNUAL RATE OF DETERIORATION IN LANE MILES

1746

13

8

218

723

6

18

40

2519

19

10

252

2800

21

12

233

1921

15

15

128

3387

26

20

170

13095

100

Asphalt

1

Controlled Access Concrete

2 3

4

ESAL>540 or ADT>10,000 540>=ESAL>405 or 1600270 or 400 1/4" ; < 7/8" >7/8"

RAVELING

IRI PMS Points 0 - 80 0 81 - 100 100 101-115 200 116 - 130 300 131 - 160 400 > 160 500 Friction Number PMS Points 2 to 20 400 21 to 30 250 31 to 36 100 above 36 0 Average Rut Depth PMS Points 0 to .25" 0 .26 to 1.00" (675.7 x RD) - 168.9 1.01 to 1.50" (392.2 x RD) + 111.8 above 1.50" 700 Fatigue A = 1.50 x Extent Fatigue B = 2.00 x Extent Block B = 1.00 x Extent Block C = 1.00 x Extent PMS Points = Extent x (LC Severity Factor) Where LC Severity Factor is determined from: Crack Width 805 All Other Routes (Low Volume Roads) T.S.I. =2.5 T.S.I. =2.0

Picture No. 17 (low) 18 (moderate) 19 (severe) Picture No. 20 (low) 21 (moderate) 22 (severe)

LC Severity Factor 0.20 0.8 x (crack width) + .80 1.50

IRI PMS Points 0 - 90 0 91 - 130 100 131 - 150 200 151 - 170 300 171 - 200 400 > 200 500 Friction Number PMS Points 2 to 20 400 21 to 30 250 31 to 36 100 above 36 0 Average Rut Depth PMS Points 0 to .45" 0 .46 to 1.19" (675.7 x RD) - 304.1 1.20 to 1.70" (392.2 x RD) + 33.3 above 1.70" 700 Fatigue A = 1.00 x Extent Fatigue B = 1.50 x Extent Block B = 0.50 x Extent Block C = 0.50 x Extent PMS Points = Extent x (LC Severity Factor) Where LC Severity Factor is determined from: Crack Width 699

Network Condition Based on Repair Category Status

Network Condition Based on Functional Classification Inventory

PMS Information 

Short-term pavement management philosophy  Maintain

the Interstate highways and Non-interstate Principal Arterial roads at a high level of service by the construction of proactive mill/thin HMA overlays as funding allows and major rehabilitation of inferior pavement segments as necessary  Apply preventive and corrective maintenance treatments and repairs to other routes as funding allows Nevada Department of Transportation “Smooth Roads Ahead”

PMS Information 

Long-term pavement management philosophy 





Maintain Interstates and Non-interstate Principal Arterial roads at a high level of service by the construction of proactive mill/thin HMA overlays as funding allows and major rehabilitation of inferior pavement segments as necessary Preserve Minor Arterials, Major Collectors, and Minor Collectors at a good level of service by the construction of proactive mill/thin HMA overlays as funding allows and major rehabilitation of inferior pavement segments as necessary Manage low volume roads at an acceptable level of service by application of preventive and corrective maintenance treatments and repairs

Nevada Department of Transportation “Smooth Roads Ahead”

Funds Spent for Pavement Preservation and Maintenance Since 1999 Total Funds Spent Centerline Miles for Pavement Funds Spent for Rehabilitated Years Maintenance Preservation and (Does not include miles $ Millions Maintenance for maintenance) $ Millions 1999-2000 $329 $25 $354 1,002 2001-2002 $202 $22 $224 404 2003-2004 $202 $20 $222 387 2005-2006 $197 $20 $217 288 2007-2008 $167 $37 $204 185 *2009-2010 $268 $50 $318 383 * Does not include an additional $124 million in American Recovery Reinvestment Act Funds Funds Spent for Pavement Preservation $ Millions

Outline  Nevada’s

state-maintained roadway network

 PMS

background and system information

 Recent

accomplishments

 Current

endeavors

Nevada Department of Transportation “Smooth Roads Ahead”

Recent Accomplishments 

PMS Application Collection of 11 separate databases housed within one easy to use software program  Forms and data collection schedules are created  Raw data are processed with specialized software and entered into databases  Editing programs to verify the validity and integrity of the data  Information is synthesized for network level and project level needs 

Nevada Department of Transportation “Smooth Roads Ahead”

Contract Database

Data Warehouse

RBH Database

Outline  Nevada’s

state-maintained roadway network

 PMS

background and system information

 Recent

accomplishments

 Current

endeavors

Nevada Department of Transportation “Smooth Roads Ahead”

Current Endeavors 

NDOT will publish a Pavement Management System Overview manual  





Heightened awareness to provide transparency and accountability Want everyone to understand the system and not think of it as a “big black box where some magic happens” Need to make NDOT’s PMS relevant to legislature, university professors, engineers, technicians, and any interested public parties as well as our own administrators Can be used as a marketing tool

Nevada Department of Transportation “Smooth Roads Ahead”

Current Endeavors 

The Pavement Management System Overview manual will contain:  Legal requirements, benefits, and limitations  Complete review of the PMS Application software  Network level project prioritization procedures  Project level development process  Needs analysis, serviceability concept, LCCA, and importance of maintenance treatments  Reporting features and more

Nevada Department of Transportation “Smooth Roads Ahead”

Like any agency, NDOT’s objective is to provide total pavement management by improving the condition of the entire roadway network while maximizing pavement performance and keeping costs to a minimum.

Nevada Department of Transportation “Smooth Roads Ahead”