Sample Design Clause Samples

Sample Design. TTI proposes to complete a total of 2,000 surveys, distributed by facility and user type as suggested in Table 1. Customer Satisfaction Core 500 500 500 500 0 MoPac Corridor Supplement 0 0 0 250 250 500 Two thousand surveys will be collected for the customer satisfaction core, 500 from each of the four CTRMA toll facilities. The sample size for the MoPac Corridor Supplement will be 1,000. However, approximately 500 of these surveys will be shared with the customer satisfaction core. That is to say, these 500 will first answer the core questions, then be asked the MoPac Corridor Supplement. The balance of the MoPac Corridor Supplement will be comprised of individuals that never use the managed lanes, but do use the general purpose lanes. At present, these are sample targets, not hard quotas. The literature review will help flesh out the sample design, by hopefully refining what is known about sample universe. A customer or user will be anyone who has used any of CTRMA’s four regional toll facilities in the last month: 183A Toll Road, MoPac Express Lanes, ▇▇▇ ▇▇▇▇ ▇▇▇▇, and/or 71 Toll Lane facility. The geography for this survey, will be a six county area: Williams, Travis, ▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇, and ▇▇▇▇▇▇. We assume that most users will be in ▇▇▇▇▇▇ and ▇▇▇▇▇▇▇▇▇▇ . These two counties not only “house” facilities, they are also the most heavily populated. There will be no geographic targets. In order to be eligible to participate in the survey, a respondent must be at least 18 years of age, a licensed driver, and speak English well enough to participate in a survey in English Because CTRMA toll facility customers can pay their tolls in two ways (toll tag or PBM), it is important that the sample plan incorporate this variable into the sample strategy. The CTRMA PBM contractor has agreed to provide a mailing address database of these customers. This will facilitate a phone match, and subsequent mixed method data collection. Because TxDOT cannot release tag holder information for non-TxDOT sponsored research, the project team will have to purchase a sample and screen the general population for tag holders and MoPac general purpose lane users. TxDOT has provided estimates of TxTag accounts and tags by county (see Table 2). Bastrop 20,927 37,715 26,015 80.40% Burnet 7,887 15,117 16,545 47.70% ▇▇▇▇▇▇▇▇ 7,197 12,578 12,894 55.80% Hays 39,410 70,366 68,045 57.90% ▇▇▇▇▇▇ 305,024 512,905 447,561 68.20% ▇▇▇▇▇▇▇▇▇▇ 179,552 313,805 170,051 105.60% Total 559,997 962,48...