Development of Levels of Service for the Interstate Highway System (2010) / Chapter Skim
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Pages 9-15
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From page 9... ...
92.1 Overview A state-of-the-practice review was performed to identify approaches used by the federal government and state departments of transportation to measure and report highway LOS. This included identifying approaches used to aggregate facilitylevel data to report level of service by functional class and/or distinguishing between highways within metropolitan boundaries and outside those boundaries.
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Florida Mississippi Washington Economic Prosperity Economic Development (No equivalent goal) Environmental Preservation Environmental Stewardship Environmental Protection Mobility Accessibility & Mobility Mobility Preservation Maintenance & Preservation Preservation Safety Safety Safety & Security (No equivalent goal)
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Asset Class Level of Service Condition Indicator Measure Structures Structural and functional condition of decks, superstructure, substructure, and culverts Deck rating: superstructure rating; substructure rating; culvert rating; clearances (horizontal and vertical) Average National Bridge Inspection (NBI)
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provide lateral or transverse drainage and may be described as cross, side, or outfall drains. Ditches can be unpaved or paved to prevent erosion and improve flow.
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13 Asset Class Asset Elements LOS Condition LOS Indicator Deficiency Criteria LOS Measure Roadside Front and Back Slopes Functioning as intended Erosion, slides Depth of washouts, depth of accumulated material Percent of slopes deficient (measured longitudinally along roadway) Right-of-Way Fences Functioning as intended Missing/damaged Height reduction, openings Percent of length deficient Vegetation Management Condition of mowable areas Motorist visibility, aesthetics Height of vegetation in mowable areas Average height of vegetation (inches)
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2.3.4.2 Safety A well-developed state of the practice exists for measuring and reporting safety outcomes at the national and state levels. Transportation safety has long been a policy priority, with the systematic monitoring and reporting of crashes, fatalities, and injuries on the highway system.
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HPMS, NBI, traffic control devices per the Manual on Uniform Traffic Control Devices [MUTCD]
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