Development of Levels of Service for the Interstate Highway System (2010) / Chapter Skim
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Pages 29-33
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From page 29... ...
29 The importance of the IHS to the nation's economy and transportation system, and to those of individual states, is beyond question. The benefits of an LOS approach for managing assets on the IHS have been well documented in previous reports.5–6 To assist state DOTs with developing and implementing an LOS assessment process, an Implementation Plan and User Guide are presented in the following sections.
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Table 5-1 and Table 5-2 show example formats similar to those that have been used successfully by several states (Louisiana, Mississippi, North Carolina, Washington, and the West Virginia Turnpike)
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31 District Interstate Routes - 2008 LOS Ratings Asset Feature A B C D F Asphalt Pavements Potholes D+ Rutting C+ Stripping (Raveling) B+ Alligator Cracking B+ Block Cracking B+ Linear Cracking A Edge Raveling A+ Shoving A Sweeping A+ Concrete Pavements Spalling A Faulting C+ Joint Sealing A Crack Sealing B+ Punch-Outs B Pumping A Sweeping A+ Paved Shoulder Potholes B Edge Raveling B+ Unpaved Shoulder Drop-Off B- High Shoulder D Drainage Side Drains A Cross Drains D+ Edge Drains F Unpaved Ditches B+ Paved Ditches D- Drop Inlets F Table 5-2.
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8. The difference between a target and actual LOS represents an incremental adjustment needed to a specific portion of the state's previous work program to reach the target LOS in the next budget year.
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long (20 mi for both directions) and another that is 30 mi long (60 mi in both directions)
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