Assessing, Coding, and Marking of Highway Structures in Emergency Situations, Volume 2: Assessment Process Manual (2016) / Chapter Skim
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89 A P P E N D I X C C.1 Introduction In the context of emergency responses, knowledge of critical and vulnerable road links or highway structures is of great significance to reduce loss of life and increase the efficiency of transporting resources for recovery. Several state DOTs have adopted processes for the assessing, coding, and marking of highway structures in the event of emergencies resulting from natural or man-made disasters.
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90 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual • Congestion: Heavily congested roadways cannot accommodate rapid emergency response. At the same time, prediction of post-earthquake traffic patterns would be difficult.
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Traffic Levels and Capacity 91 Since the AADT is more stable and is widely used for planning purposes, in this work the research team suggests using AADT for coding a traffic level on a highway structure. In addition, availability of the data justified the use of AADT since most of the DOTs collect and spread these data.
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Facility Type General Description of Type of Road Detailed Description Motorway Limited access motorway regulations apply Routes for fast-moving long-distance traffic. Fully grade separated and restrictions on use.
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Source: Oregon DOT (2015)
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94 Assessing, Coding, and Marking of Highway Structures in Emergency Situations: Assessment Process Manual C.4 Procedure In sum, the assessment, coding, and marking of highway structures should consider a combination of the criteria concurrently; however, it is difficult to consider all the important criteria mentioned in this document. As a rule of thumb, if only the ranges of traffic levels are considered, the following procedure is recommended: 1.
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Traffic Levels and Capacity 95 Source: EPC (2015)
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