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<br /> Model Validation Matrix Estimation
<br /> M The Pleasanton model was validated against traffic The Pleasanton model documentation describes the use
<br /> counts at numerous locations throughout the City, of a"matrix estimation"technique,which factors the
<br /> g validation is important because it measures how well matrix of trip origins and destinations until it matches
<br /> 0 the model can replicate existing conditions,which traffic counts.The documentation explains that this
<br /> provides confidence in its ability to model future technique can improve validation statistics,but in ways
<br /> conditions. that are not easily explained or replicated.Our typical
<br /> To provide a high degree of confidence in the model's modeling practice does not include the use of matrix
<br /> J results,we recommend applying a more detailed level estimation for model validation,and we expect that the
<br /> of validation in which we compare model volumes with other model enhancements described here(such as
<br /> izz s counts on individual roadway links and ensure that refined trip generation rates and refined data on cut-
<br /> state-ofthe-practice validation thresholds are achieved. through traffic)would improve the model validation
<br /> Additionally,Fehr&Peers has developed"dynamic" such that matrix estimation would not be necessary to
<br /> validation methodologies to ensure that a model is meet state-of-the-practice validation thresholds
<br /> 0 appropriately sensitive to changes in input data and can Travel Demand Model Documentation
<br /> es be used with confidence to evaluate localized land use Any model that we develop is structured and
<br /> and network changes.For this task,modeling guidelines documented such that other capable transportation
<br /> Q established by Caltrans and the Federal Highway planners and engineers can understand and use it.Our
<br /> Administration will be followed. models have open architecture and are easy to use.
<br /> Eril In addition to being used to forecast roadway segment
<br /> S :43 ti;7, 42G;?17i?7L'i,lli:i eh i,' L'c'-?'is
<br /> and intersection turning movement volumes,models
<br /> 0 can also be used to estimate vehicle miles of travel
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<br /> (VMT)within a city and evaluate how land use and
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<br /> transportation network modifications could affect VMT. �• _
<br /> Updated California Environmental Quality Act(CEQA) .31. •1 7 r •,,?,ail;z in ,l,,1+ ,,, , ;,;i S
<br /> guidelines to implement Senate Bill 743 may require the J
<br /> E use of a VMT metric to determine significant } ,..1') ?' `�i II i ! l i" ' '=`-'
<br /> transportation impacts of a project(Level of Service ;: ,, ,; - ;: ,.,; r,•; ,, ;
<br /> V.a analysis can continue to be used at the City's discretion
<br /> so long as there are policies establishing Level of Service '` I :` 'i',., I , - i 7'; .:: !+'
<br /> al standards).The extents and capabilities of the
<br /> Pleasanton model do not currently permit an accurate
<br /> estimation of VMT.We have identified optional tasks ;i l•,:l i:'ci ru, S: ,it,-; ',.'f i
<br /> that would permit the preparation of VMT calculations. - - ------ -..--- ---— __ - ..----
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<br /> ..:7:11 Dynan*validation test used to diagnose sensitivity problems in the Las Vegas model .
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