Pre-approved equivalent data
The CTR Task Force Guidelines allow employers to substitute "equivalent" data for information collected through the CTR survey. To be considered equivalent and useful for measurement of NDAT and VMT reductions, data must provide information on the actual commute mode usage for employees during the measurement week. This information in turn must be linked to employee status and work schedules. These data characteristics are necessary for calculating worksite NDAT and VMT and identifying what program elements are successful at the worksite.
The local jurisdiction, in consultation with the WSDOT TDM office, will evaluate the equivalency of any data submitted by an employer in lieu of the state survey.