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Wisconsin Truck Size and Weight Study

Wisconsin Truck Size and Weight Study. presented to AASHTO Subcommittee on Highway Transport presented by Donald Ludlow Cambridge Systematics June 17, 2009. Wisconsin’s Freight Needs. Leading industries rely on goods movement Manufacturing (i.e. Machinery) Agriculture Forest Products

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Wisconsin Truck Size and Weight Study

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  1. Wisconsin Truck Size and Weight Study presented toAASHTO Subcommittee on Highway Transport presented byDonald LudlowCambridge Systematics June 17, 2009

  2. Wisconsin’s Freight Needs • Leading industries rely on goods movement • Manufacturing (i.e. Machinery) • Agriculture • Forest Products • Mineral Extraction • Paper • Dairy Products • Major growth • Ethanol • Wind Energy Components • Additional port traffic

  3. Legislative Rumblings about TSW • States accomodating heavier trucks on state/local roads, beginning to pressure Feds • Growing recognition of international progress(Compared to others, U.S. is underutilizing infrastructure, overutilizing energy resources) • Next transportation authorization bill discussions in the works • Proposals (such as H.R. 1799) for 6-axle, 97,000 pound trucks on Interstate System 80,000 lbs. 97,000 lbs. CURRENT HEAVIEST ALLOWED DIVISIBLE LOAD ON INTERSTATE SYSTEM PROPOSED HEAVIEST ALLOWED DIVISIBLE LOAD ON INTERSTATE SYSTEM

  4. WI Truck Size and Weight Study Overview HISTORY KEY QUESTIONS • Wisconsin Legislature Special Committee on Highway Weight Limits • Influenced by Minnesota Truck Size & Weight Study • WI Assembly Bill 238  WI Act 20 (10/26/07) • Requires Department of Transportation to study vehicle size and weight limits • Should changes be made to Wisconsin’s TSW laws? • What impacts would changes to TSW laws have on the State’s roads and bridges, regulatory and enforcement capabilities, administrative processes, and freight transportation modes? • What specific requirements need to be met by any vehicles operating under modified size/weight standards? Safety & Costs Economy

  5. Understanding Wisconsin’s TSW Laws Weight and Size Limits 8’6” 13’6” Tractors w/ Double Bottoms Single Unit Trucks Tractor-Trailer Combinations All Vehicles 65’ (see exceptions) 48’ 75’ (see exceptions) *53’ 40’ 28’6” 28’6” *Length from kingpin to axle must be < 43’ Weight Limits Class A Highways • 80,000 lbs. Gross Vehicle Weight (GVW) • 20,000 lbs. GW for any single axle • 34,000 lbs. for consecutive sets of tandem axles • 11,000 lbs. GW per wheel Bridge Weight limits posted by management agency (frequently local gov’t) Size Limits

  6. Similar height, width, and length restrictions Some differences in allowable GVW Michigan allows much heavier trucks Minnesota moving towards heavier trucks Illinois has lower weight limits on secondary highways (73,280 pounds) Other states have fewer load-specific permits written into laws Overweight fines higher in surrounding states TSW Laws in Neighboring States Key Findings

  7. Implementation of newer / innovative technologies has been a slow process Low replacement rates for large trucks Affordability issues for smaller companies Technology categories Pavement protection devices Safety enhancing technologies Enforcement/compliance systems Heavy Vehicle Technology Trends Weigh-in-Motion Geo-Fencing On-board Scales Vehicle Safety Features

  8. Changing Business Practices in WITrends Affecting Load Sizes and Weights • Economic pressures • Changes in supply chain management • Railroad capacity and business practices • Congestion at terminals and border crossings • Infrastructure project lead times • Urban congestion • Competing land uses • Changes in production locations in certain industries

  9. Truck driver training and experience Limited enforcement capacity Standardization of postings and permits Increasing vehicle size disparity Deployment of assistive technologies Integration of safety conditions (driver performance, fleet performance, etc.) into special permit management conditions Current Safety Issues Large Truck Crash Rate by County (2006) Source: Wisconsin Bureau of Transportation Safety

  10. Public Agency Outreach Conclusions

  11. Public Agency Outreach Conclusions

  12. Private Sector Outreach Conclusions

  13. Heavier Configurations for Analysis 6-axle 90,000 pound Semi 7-axle 80,000 pound Single Unit 6a TST 90 7a SU 80 45’ 6-axle 98,000 pound Semi 8-axle 108,000 pound Semi 6a TST 98 8a D 108 7-axle 97,000 pound Semi Straight Truck plus Pup Trailer (98k) 7a TST 97 6a STT 98

  14. Truck Traffic Effects of New Configurations Goods Movement Costs Truck operating cost effects Pavement Costs Change in ESAL miles Potential adjustments in maintenance assumptions to customize Bridge Costs Replacement/Posting, Fatigue, New Bridges Crash Costs Based on changes in truck VMT by configuration type Congestion Costs Savings from potential reduced truck VMT Benefit-Cost Analysis Methodology GOAL: Estimate the Impacts of Potential Changes to TSW Law Costs Benefits

  15. Estimating Safety ImpactsMinimizing Crash Risk More Productivity = Reduced Exposure Heavier Vehicles = Slightly Higher Crash Rates

  16. Estimating Bridge CostsBridge Considerations - Axle Spacing vs. Axle Weight

  17. Cost-Benefit AnalysisAnnual Benefits and Costs Non-Interstates Federal BridgeForumula Transport Savings Configuration Congestion Pavements Safety All Values in $ Millions per Year (assumes operation on non-Interstates only)

  18. Cost-Benefit AnalysisAnnual Benefits and Costs Including Interstates Federal BridgeForumula Transport Savings Configuration Congestion Pavements Safety All Values in $ Millions per Year (assumes operation on Interstates)

  19. Interstate TSW LawsImpacts on Cost Savings

  20. Policy Directions

  21. Administer performance-based permit program Develop a comprehensive truck crash study Work with Federal government to explore the potential for TSW changes on the Interstate System Review OS/OW permit process Increase fines for commercial vehicle size/weight violations Increase resources for TSW enforcement Review non-permitted weight exceptions Policies for Consideration

  22. Report Findings No recommendations for heavier/larger trucks on WI non-Interstate highways at this time Ongoing coordination with Wisconsin legislature Internal Freight Issue Management Development of internal Freight Issues Committee Exploring development of external Freight Advisory Committee Participate in AASHTO discussion with the federal government concerning weight limits on Interstates Safety Initiating Long Truck Safety Study Wisconsin Policy Implementation Actions

  23. Wisconsin Policy Implementation Actions (cont.) Oversize/Overweight Permitting Developing bi-state OS/OW permitting program with Minnesota Studying programmatic changes to enhance permitting issuance and monitoring (focus on wind tower shipments) SWEF Inspection Technologies Implementing enforcement technologies such as automated vehicle identification (AVI) CVISN and Related CV Technologies Reviewing CVISN Program to identify “mainstreaming” opportunities Performance Measurement Reviewing mechanisms to keep rules current, respond to industry 22

  24. Questions

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