2013 Session: 611

• Relationship Between Asset Condition and Safety on Primary Roads in Iowa
  Abstract: Past research has revealed the relationship between individual asset condition and safety, but the relationship between combined measures of operational asset condition and safety performance has not been fully explored. This paper investigates the effect of pavement marking retroreflectivity and pavement condition on safety on primary roads in Iowa. Asset condition and crash data on one-mile road segments for all Iowa primary roads from 2004 to 2009 period were collected from the Iowa Department of Transportation and integrated based on route milepost. An Asset Condition Index (ACI), with a range of 1 to 3, was developed for the road segments by scoring and weighting individual asset condition components. Separate statistical models for different ACI ranges were then developed to estimate the relationship between ACI ranges and expected number of crashes, while controlling for exposure. It was found that the impact of ACI on crash frequency for roadway segments with ACI lower or equal to 1.5 was higher compared to that for roadway segments with ACI higher than 1.5. Finally, alternative pavement and pavement marking treatment strategies were evaluated considering related treatment costs and safety benefits in the short-and long-term. For short-term improvement programs, minor pavement rehabilitation and the use of durable pavement marking materials were recommended as the most cost-effective treatment alternatives. For segments with ACI lower than 1.5, major rehabilitation and tape markings are recommended for the long-term.
  Authors: Gao, Jian; Aldemir Bektas, Basak; Gkritza, Konstantina; Smadi, Omar G.; Hawkins, Neal R.
  Authors: Gao, Jian; Aldemir Bektas, Basak; Gkritza, Konstantina; Smadi, Omar G.; Hawkins, Neal R.
  Year: 2013
  Document Type: Paper
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-1804
• Development of an Asset Management Screening Tool
  Abstract: This paper represents a concise summary of a project to develop an Asset Management Screening Tool for use by transportation agencies. The purpose of the screening tool is to provide a screening instrument for state transportation agency managers to use to help assess the best asset management approach or strategy for various assets. In particular, maintenance managers at agencies that do not have a fully integrated and data-populated asset management system may find the tool helpful. It was designed to facilitate the decision-making process related to asset management and associated performance measures for safety and operations. The Asset Management Screening Tool is based on the Asset Management Guidebook, a stand-alone product that was also developed during this research project. The guidebook contains easy-to-use, practical guidelines that DOT personnel can use to identify the best approach to asset management on three possible levels if feasible and practical: (1) total asset management for large urban areas encompassing multiple counties, (2) asset management of critical functions on a smaller regional scale, and (3) asset management for specific types of assets that may be based on warranty specifications. The Asset Management Screening Tool is a simplified version of the guidebook: essentially an instrument that provides guidance electronically to the end users. A detailed user guide accompanies the tool. The screening tool is a stand-alone, standardized, Windows® application designed to be able to be run on any Windows® based computer. The tool and guidebook can be found at: http://tti.tamu.edu/documents/0-6390-P2.zip.
  Authors: Theiss, LuAnn; Kuhn, Beverly T.; Yang, Yonggao; Perkins, Judy A.
  Authors: Theiss, LuAnn; Kuhn, Beverly T.; Yang, Yonggao; Perkins, Judy A.
  Year: 2013
  Document Type: Paper
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-4066
• New National Guidance for Highway Asset Management in the United Kingdom
  Abstract: 1 NEW NATIONAL GUIDANCE FOR HIGHWAY ASSET MANAGEMENT IN THE2 UK3 ABSTRACT4 Over the last decade the majority of the 250 highway authorities in the UK have developed5 highway asset management plans. The CSS Framework Guidance on Highway Asset6 Management (HAM) published in 2004 provided a real stimulus to help Local Highway7 Authorities (LHAs) get started.8 The recently published report by the English Government’s Audit Commission ‘Going9 the Distance’, further emphasised the economic benefits of applying comprehensive asset10 management to road infrastructure but also identified there was a very mixed economy in11 the take up the LHAs in adopting a comprehensive approach to applying HAM.12 The English Government’s Highway Maintenance Efficiency Programme (HMEP) was13 established in 2011. £6million of funds have been allocated to develop a comprehensive14 and long term efficiency programme aimed at supporting English LHAs up to 2018. Over15 the coming years, HMEP will provide practical and adaptable efficiency solutions.16 Recognising the importance of raising the bar in HAM in the UK, HMEP is supporting17 asset management projects:1819 • New document for Highway Infrastructure Asset Management (HAM)20 • A toolkit for HAM life cycling planning21 • A standard deterioration model22 • Guidance on the most cost-effective approach to maintaining drainage assets23 All the products are currently under development and are scheduled to be completed in24 Autumn 2012.
  Authors: Lugg, Matthew David
  Authors: Lugg, Matthew David
  Year: 2013
  Document Type: Paper
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-3813
• Strategic Total Highway Asset Management Integration
  Abstract: In order to successfully manage a significant quantity of aging roadway infrastructure and growing traffic volume, agencies are faced with challenges in developing reliable long term plans that maximize network performance through optimization of programming preservation projects at the network level.Current practice typically involves relatively independent planning for bridge and pavement sub-assets; with a very slight number of situations allowing for reliable trade-off analysis between the two. The choice to improve two bridges rather than one pavement section may yield a greater per cent increase in the bridge network performance than one pavement section would for the pavement network. The reliability of this choice being right and at the right time significantly decreases over the long term.Mutually inclusive highway asset planning by an integration of the bridge sub-asset into pavement sub-asset significantly increases long term planning reliability. A key point of this Strategic Total Highway Asset Management Integration (STHAMi) approach is the Conceptual Structural Integration Factor (CSIF). Integrating the Bridge Condition Index into a pavement performance index allows for treatment of bridges as equivalent pavement sections.STHAMi resulted in a higher percent of model network treated per unit of value, coupled with consistent higher annual network performance over a 25 year span. Key benefits include introduction of one pavement performance indicator as an overall encompassing highway performance measure for combined long-term bridge and pavement sub-asset planning. The approach makes long term planning for both sub-assets possible within a pavement oriented engineering organizational unit.
  Authors: Posavljak, Milos; Tighe, Susan Louise; Godin, Jerry W.
  Authors: Posavljak, Milos; Tighe, Susan Louise; Godin, Jerry W.
  Year: 2013
  Document Type: Paper
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-5020
• Vulnerability Analysis of Degrading Roadway Networks
  Abstract: Vulnerability of roadway systems to disasters, such as terrorist attacks or natural disasters has been studied in the past. However, other factors, such as infrastructure degradation, that can significantly affect the vulnerability of roadway systems have not been explicitly addressed in the past research. In this paper we propose a framework to understand the dynamics of roadway system vulnerability based on the condition of the roads. Modeling the roadway network as a graph, and the roadway conditions with disruption/failure probabilities, we study the vulnerability of the roadway system using two measures: network efficiency and vehicle miles of travel (VMT). The application of the framework is illustrated with a simple case study. We also present a preliminary analysis to demonstrate how the roadway topography and condition can affect the dynamics of the system vulnerability. Finally we discuss the contribution of this approach to developing a more effective management system for critical infrastructure.
  Authors: Dehghanisanij, Mohammadsaied; Flintsch, Gerardo W.; McNeil, Sue
  Authors: Dehghanisanij, Mohammadsaied; Flintsch, Gerardo W.; McNeil, Sue
  Year: 2013
  Document Type: Paper
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-4553
• New National Guidance for Highway Asset Management in the United Kingdom
  Authors: Lugg, Matthew
  Authors: Lugg, Matthew
  Year: 2013
  Document Type: Presentation; Poster
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-3813
• Development of an Asset Management Screening Tool
  Authors: Kuhn, Beverly
  Authors: Kuhn, Beverly
  Year: 2013
  Document Type: Presentation; Poster
  Subject: Administration and Management
  Session: 611
  Paper Number: 13-4066