addressing climate change adaptation in regional transportation plans

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Addressing Climate Change Adaptation in Regional Transportation PlansA Guide for California MPOs and RTPAsFigure 9.1Conducting an Asset InventoryCALTRANS GIS AND CAL‐ADAPTOR SIMILAR DATAREGIONAL &LOCAL DATADEFINEBOUNDARIESDEFINE ASSETCATEGORIESCOLLECT ASSET DATACONDUCTCRITICALITYASSESSMENTVULNERABILITYAND RISKASSESSMENTREGIONALCORRIDORPOLITICALMODALCONSIDER THEUNIVERSE OFASSET TYPESNONTRANSPORTATIONASSETSHIGH‐LEVELCRITICALITYSCREENINGDIGITALELEVATIONMAPSDEVELOP DATAATTRIBUTES FORSUBSEQUENTANALYSISASSEMBLING A SETOF ASSETS IN AGEODATABASEQUALITATIVEMETHODSQUANTITATIVEMETHODSSource: Cambridge Systematics, Inc., 2012.9.2 CONDUCTING AN ASSET INVENTORYIdeally, the asset inventory will bring together multiple categories of data in aGeographic Information System (GIS) to support the vulnerability identification,risk assessment, and adaptation planning tasks that follow. In order to develop aplausible picture of infrastructure vulnerability, reliable data on the location,extent, elevation, and physical and operational characteristics of assets should beobtained. Risk assessment, and ultimately adaption planning, additionallyincorporate attributes that express how critical a given asset is to an agency, thegreater transportation system, and the broader region. These data also help toconstruct a better understanding of the potential consequences of climate-relatedasset failure.Determine the Boundaries of Your Study Area(s)Although seemingly the most basic consideration, the selection of study areaboundaries may have significant impacts on both the granularity of theinventory – including how many asset types are included – and the resourcesrequired to carry out the subsequent vulnerability and risk assessment tasks.Further, depending on assets inventoried, broader geographic scales could yielddata mismatches or incompatibilities (if, for example, two municipalitiesmaintain differing data fields for a similar asset type).9-2 Cambridge Systematics, Inc.
Addressing Climate Change Adaptation in Regional Transportation PlansA Guide for California MPOs and RTPAsAlthough there are no strict requirements, generally boundaries can be definedusing the following guidelines:Regional. Including the entire MPO or RTPA geography may provide themost comprehensive geographic coverage, but may necessitate sacrifices inthe quantity, type, and scale of data used to populate the inventory. Forexample, lower roadway functional classifications, such as local access roads,might be omitted or suppressed in order to shift resources to more criticalroadways, such as freeways and other principal arterials. Corridor. Corridors can be oriented to the transportation system(representing a thick backbone of roadway or multimodal infrastructure, forinstance), or emphasize economic, social, or natural features. A corridor canbegin and terminate within a single region, or run through multiple regions.The choice of corridor boundaries will depend on the objectives of the overallassessment and, again, on the desired scale of the analysis.Political Unit. At the level of the county or municipality, the granularity ofdata may be finer and more directly relevant to study objectives (bicycle andpedestrian oriented infrastructure, for example, become more readilyaccessible at reduced scales). However, smaller geographic analyses maytrade a more comprehensive perspective (of network dependencies, forexample) for the ability to focus more closely on a more narrow physical area.Modal. If the study objectives focus on a single or small subset of modes, itmay be appropriate to constrain the study boundary only to geographiesrelevant to that mode or modes. A study focused on general aviationairports, for example, may lead to a study area comprised of severalgeographic “islands” – although expanding the study to assess airport accesswould require the addition of a selection of roadway layers.The choice of asset types to be included will have a significant impact on theresources required for the assessment (with the exception of the “Modal”method, of course). A very extensive geography may be manageable if a limited,standardized selection of assets is included (Interstates, for instance), whereas asmall geography richly layered with modal infrastructure and other asset typesmay be very labor intensive.Define Asset CategoriesConsider the Universe of Asset TypesAlthough the types and overall quantity of assets eventually included in the assetinventory will likely comprise only a small selection of the overall universe(within the study boundaries), it is good practice to devote some time up front todefining that universe. This step can lead to the identification of synergies oropportunities that involve little marginal effort (“if we’re collecting this, why notthat as well?”); and also help prevent obvious omissions. For highlyCambridge Systematics, Inc. 9-3
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appendix b reportState-of-the-Pract
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State-of-the-Practice Climate Chang
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C A L I F O R N I AADAPTATIONPLANNI
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Adaptation Planning Guide - Advisor
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List of Tables (cont’d.)Table 6.
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Climate Impact RegionsThe APG is or
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APGSTART HERE:PLANNING FOR ADAPTIVE
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What are the designated climate imp
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CA Climate Adaptation Planning Guid
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• Selected Demographic Data. Sele
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Cal-Adapt ProjectionsTable 1. Summa
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Selected Infrastructure and Regiona
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illnesses due to air pollution resu
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Additional Resources• Sea level r
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Cal-Adapt ProjectionsTable 5. Summa
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frequency can harm forests. Large i
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Bay Area RegionCounties: Alameda, C
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the Sacramento and San Joaquin rive
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Table 12. Selected Population Data
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Sea level rise is also expected to
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Additional Resources• Public Heal
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Cal-Adapt ProjectionsTable 13. Summ
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Table 16. Selected Population Data
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As with crops, climate change impac
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Additional Resources• Wildfire Re
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elevations, increased static levee
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The ecosystem functions of the Delt
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Setting and HistoryThe California D
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The islands in the lower Bay-Delta
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Some of the questions that should b
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Southern Central Valley RegionCount
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Biophysical CharacteristicsThe west
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The crops produced are varied and i
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Communities in this region should e
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have the resources to prepare for,
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Additional Resources• Sea Level R
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Timber practices have also had ecos
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Southeast Sierra RegionCounties: Al
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Biophysical CharacteristicsThe sout
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ultimately result in reduced water
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particular concern are populations
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Additional Resources• Sea Level R
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industry around Big Bear. As there
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California Natural Resources Agency
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